DR. SHRINK
TIPS AND FAQs
- Shrink wrapping Tips
- Is it hard to shrink
wrap?
- What about
moisture under the cover?
- Support structures?
- Can the heat tool
cause damage?
-
How do I repair tear or burn holes in the cover?
-
Is there anyway I can get into the cover during the storage
season?
-
What other hardware items do I need to shrink wrap besides a
heat tool?
-
What do I do with my shrink wrap after I remove it?
-
How do I measure and find the right size shrink wrap for my
products?
-
Can I get technical assistance?
-
If I am transporting a product should I attach the cover
differently?
-
What color shrink wrap should I use? Is
there a difference?
- Taping on Covers
- Wrapping Instructions
- Machinery Covering Tips
- Shrink Wrapping
Sailboats
-
Shrink Wrap Large Buildings
(pdf)
-
When will my order ship? - ** FREIGHT
INFO
Want to see a boat get shrink wrapped,
along with an explanation of the steps involved?
Order a Training CD
WARNING
"This shrink wrap can burn. If heat is applied
incorrectly, shrink wrap can ignite into open flame. It can
also drop down on to other combustible material and cause
secondary ignition and fire. If at any time you observe the
shrink wrap on fire, immediately stop what you are doing and
carefully inspect the area where you are working for a
possible fire. Keep a fire
extinguisher available at all times. Inspect the cover
for up to 30 minutes after shrink wrapping to look for hot
spots”.
SHRINK WRAPPING TIPS
Shrink wrapping is a series of logical steps with a bunch of
common sense thrown in the mix. A professional job can be
accomplished by following the tips listed below.
1. Always survey the items to be covered before beginning the
shrink wrapping job. Note any current damage with either a
written check list or digital camera. Also look for hazards
that could affect the shrink wrappers or the shrink wrap.
These could be sharp objects, potential slip areas,
combustible materials or fumes. Have the proper equipment for
completing the job before starting. This means all necessary
personal safety equipment, ladders, man lifts, fire
extinguishers, etc. Remember, unless specifically stated as
being “Flame Retardant” on the label of the shrink wrap: "This
shrink wrap can burn. If heat is applied incorrectly, shrink
wrap can ignite into open flame. It can also drop down on to
other combustible material and cause secondary ignition and
fire. If at any time you observe the shrink wrap on fire,
immediately stop what you are doing and carefully inspect the
area where you are working for a possible fire. Keep a fire
extinguisher available at all times."
2. Measure all areas to be covered to assure that you have the
proper size shrink wrap to cover the project in the fewest
number of pieces. It is much easier to cover large objects in
one piece of shrink wrap. Use the thickest material possible
on larger objects. If it is necessary to use two pieces of
shrink wrap then there must be an allowance of 8-10 inches of
overlap where the pieces will be joined. Flame retardant
shrink wrap is available for roofs, scaffolding, machinery,
boats, etc.
3. Always have an attachment plan ready before taking the
shrink wrap out of the box. Shrink wrap must be attached
firmly around the entire perimeter for it to become a tight
durable cover. It can be attached by woven cord strapping,
tape, steel cabling or furring strips—depending on the job.
4. Keep the shrink wrap clean and folded as long as possible
during installation. Shrink wrap head welds to itself much
better when it is clean. Once the shrink wrap is unfolded it
is much harder to manage in case the wind comes up. NEVER
SHRINK WRAP IN A WIND OVER 10 MPH!
5. Use Common sense. Don’t walk on the shrink wrap when it is
wet, don’t shrink wrap if you can smell flammable aromas, use
all safety equipment necessary. Keep a fire watch at all times
and inspect the job for _ hour after the shrink wrap is heated
to make sure there are no hot spots. Never shrink wrap over
fuel vents, air vents on roofs, roof drains, air conditioning
units, etc. Never drink alcohol before shrink wrapping.
6. Tight Shrink wrap Covers are the most durable covers.
Shrink wrap works much better than poly tarps because it does
not move or chafe when properly applied and heated. The
tighter the cover is—the better. Again, firm attachment points
around the entire perimeter of the shrink wrap are necessary
to ensure the shrink tightness comes from shrinking the wrap
itself rather having the edges pull in.
IS IT HARD TO SHRINK WRAP?
No, it isn’t difficult to shrink wrap. We suggest watching the
Dr. Shrink “ Wrap it up Video” at least twice before shrink
wrapping and also evaluate the weather if you will be shrink
wrapping outside. Clear days with light winds make the
covering process go much quicker and you will end up with a
much more durable cover. Shrink wrapping is a series of
logical steps mixed with common sense.
WHAT ABOUT
MOISTURE UNDER THE COVER?
Every shrink wrap cover must be ventilated to eliminate
moisture and condensation under the cover. Our DS-683
self-adhesive vent allows cross flow ventilation throughout
the cover minimizing chances of excess moisture and mildew.
The number of vents will vary according what you are covering,
but a minimum would be 3 vents for runabouts and up to 8+
vents for boats 34 foot and above. Cabins and seat cushions
should also be left open to help stimulate ventilation. Also,
refer to the Shrink Wrap page for the chart titled
DR. SHRINK BOAT
SIZE & VENTING
SUPPORT STRUCTURES?
Support structures are very important under shrink wrap
storage covers. Dr. Shrink’s “Wrap it up Video” will guide you
step-by-step in the construction of a woven cord strapping and
wooden upright support system (simply using your 2 x 4's with
Dr. Shrink's end caps). These simple, yet effective supports
give the cover enough slope and strength so that snow and rain
will run off.
CAN THE HEAT TOOL
CAUSE DAMAGE?
The propane fired heat tools used in shrink wrapping must be
used in accordance with the directions in the Dr. Shrink’s
“Wrap it up Video”. Always remember Safety First!! The video
will explain how heat is swept over the cover, almost like
spray painting, and is never left on one spot long enough to
damage vinyl graphics, paint, gel coat, wood, etc. In fact,
the shrink wrap will become thin and holes will form before
enough heat is transferred to damage what is being covered. If
the shrink wrap should get a burn hole, and it appears the
wrap is stuck to the product, just leave the wrap cool and it
will come loose by itself.
HOW
DO I REPAIR TEAR OR BURN HOLES IN THE COVER?
First, holes are not rare in shrink wrap covers. It is very
easy to puncture the material before it is shrunk, conversely,
it is easy to repair holes. If it is a small hole a piece of
heat shrink tape will fix it quickly. If it is a larger hole,
a scrap of shrink wrap approximately 2” larger than the hole
may be taped on the original cover and lightly shrunk.
IS THERE A WAY I CAN GET INTO THE COVER DURING THE STORAGE
SEASON?
Yes! Dr. Shrink, Inc. offers both a 30”X36” and 30”X48” zipper
access door. These are installed, by taping them onto the
shrink wrap, after the cover is completely shrunk.
WHAT OTHER HARDWARE DO I NEED TO SHRINK WRAP BESIDES A HEAT
TOOL?
Our shrink wrapping program is very simple, but you will need
a DS-15 Tensioning Tool, DS-007 Film Cutting Knife, DS-009
Long Cuff Safety Gloves, and DS-010 Safety Glasses along with
a Heat Tool/Shrink Wrap Gun. Equipment the installer needs to provide
include ladders to fit the job, 20lb. propane tank, hand saw,
jack knife, Arrow T-50 Stapler, and a 25’ tape measure. Of
course, you will need shrink wrap to fit the job, strapping,
buckles, tape and vents.
WHAT DO I DO WITH MY SHRINK WRAP AFTER I REMOVE IT?
Dr. Shrink, Inc. has a unique recycling program call the REBAG®
System. Each REBAG® holds approximately 600 sq. ft. of shrink
wrap and comes with a closure device and a prepaid UPS
Authorized Return System label. Our system works throughout
the United States and Canada.
HOW DO I MEASURE AND FIND THE RIGHT SIZE SHRINK WRAP FOR MY
PRODUCTS
This is very easy to do. Measure from the center of your
product, at the highest point, over the side and down at least
8” below where you want the cover to go. For example, on a
powerboat with arch: measure from the center of the arch to down
below the rub rail. Then double that figure and add on 1 foot for the shrink wrap which will be tucked under the
perimeter band.
CAN I GET TECHNICAL
ASSISTANCE?
Yes, Dr. Shrink, Inc. may be contacted at (800) 968-5147, from
8:00a.m.-6:00p.m. Monday through Saturday, when you have
questions or comments about shrink wrapping. They can guide
you through the basics of wrapping or help with that “special”
job. Dr. Shrink, Inc. may also be contacted by e-mail at
drshrink@dr-shrink.com
IF I AM TRANSPORTING A PRODUCT SHOULD I ATTACH IT DIFFERENTLY?
Definitely. Transportation covers need no support structure,
just a couple of straps running fore and aft under the shrink
wrap to give it support as it travels down the road. Also, a
very good way of holding the shrink wrap to the product is by
taping it on using our Preservation Tape. This tape leaves no
adhesive residue and keeps wind from blowing under the cover
which may cause chafing or loss of the shrink wrap.
WHAT COLOR SHRINK WRAP SHOULD I USE? IS THERE A DIFFERENCE?
Shrink wrap comes in blue, white & clear. If you live in a
northern climate blue wrap absorbs heat and allows snow and
ice to fall from the cover. For southern climates white
reflects heat and keeps covered boats cooler.
(Clear shrink wrap is only
available from SailorSams by special order - it should only be
used on boats during the winter months. It absorbs a lot of
heat which can damage boat interiors. If you use clear wrap
always over ventilate.)
If you are showing boats or working on them, white should be
the color of choice. It provides an excellent shadow free
lighting and perfect color rendition.
TAPING ON COVERS
Installing a shrink wrap transportation cover using 4” hull
tape to hold the cover onto the boat is a quick, durable, and
cost effective method of protection.
1. Pad sharp objects on the boat and also all items such as
vinyl interiors that could be damaged by excessive heat.
Generally, one layer of shrink wrap over vinyl will be
sufficient. Place anti-chafe tape on all areas that may be
abraded, including vinyl graphics. Tape over the fuel vent to
prevent fumes from escaping.
2. Determine how far down the hull sides the shrink wrap will
come. The shrink wrap should cover all vinyl graphics so that
the hull tape will not adhere to them.
3. This step is very important—the hull must have all wax and
mold releases removed from the hull where the hull tape will
attach to it. Use rags and isopropyl alcohol (rubbing alcohol)
to clean a swath along the hull at least 8 inches wide. This
will assure proper adhesion of the tape.
4. Install a simple support structure by running 3⁄4”
strapping from one cleat on the stern through the cleat, or to
the top of the rail, on the opposite side at the bow, then
through the other bow cleat, or rail, to the opposite stern
cleat. You should have a criss-cross pattern. Pull it tight so
that it will support the plastic. This should be done on all
boats and gives extra support in case the covers are left on
for extended periods.
5. Pull the shrink wrap over the boat making sure it doesn’t
touch the ground. Static electricity will allow the shrink
wrap to pick up dirt and grime and will affect the shrinking
and adhesion of the tape.
6. Once you have enough wrap at the bow, tape it below the rub
rail on each side to hold it in position. Now cut the wrap at
the stern 4”-6” below where it will be taped on. Trim the wrap
in the center of the transom and tape it to the hull. Now that
the material is taped fore and aft it will be held in place
while it is trimmed completely around the hull using a Dr.
Shrink’s Film Cutting Knife. Use of this tool will give a
straight line around the hull making it much easier to tape,
plus the knife cannot damage the hull or cut employees.
7. Before you begin taping the shrink wrap to the hull form
the pleats at each side of the windshield. Fold them towards
the stern, pull the plastic until it is taut, and tape the
wrap to the hull at that point.
8. Now the entire cover can be taped to the hull using 4” hull
tape. Start at the bow or stern and tape as closely as
possible so that the tape is halfway on the shrink wrap and
half on the hull. Rub the tape to eliminate air bubbles under
it. Always cut the tape rather than tearing it—rough edges
allow moisture under the tape which kills the adhesive. Make
sure the tape is sticking tightly to the hull around the
transom and swim platform.
9. The cover is ready to be completely shrunk after step 8.
Begin at the bottom of the cover at the bow or stern using the
heat tool as though you are spray painting. Note: this is not
flame retardant shrink wrap. It can burn. Keep a fire
extinguisher nearby at all times. Shrink up to the rub rail
around the entire boat before shrinking the top. This will
pull the excess out of the top and provide a much tighter
cover.
10. After the cover is totally heated go around the boat and
repair any holes with hull tape.
The most important steps are:
a. Padding sharp objects, cleaning the hull of all waxes and
release agents, and taping the fuel vent.
b. Cutting the shrink wrap in a straight line around the hull.
c. Applying the tape equally to the wrap and hull, then
rubbing the tape to eliminate air bubbles under the tape and
help assure complete adhesion.
d. Running 3⁄4” strapping fore and aft to make a simple,
strong support structure for the wrap to rest on.
WRAPPING INSTRUCTIONS &
Materials Required List
The purpose of using shrink wrap in the marine field is
twofold:
1. To enclose boats for protection them from the elements when
they are stored outside during the off-season.
2. To protect new boats as they are transported from the
builder to the dealer. Each of these applications has a
different method of installation of the shrink wrap. The only
common denominator is that each uses a piece of shrink wrap as
the cover and a heat tool to shrink it.
Shrink wrap (#4 LDPE) The
shrink wrap itself is a 6 or 7 mil, low density polyethylene
(#4 for recycling purposes). What makes this material
different than construction plastic sheeting is that it
contains shrinking resins, UV inhibitors, anti-brittling
compounds, and strengtheners so that it will not rip or tear.
Dr. Shrink, Inc. uses only virgin resin material in our
premium shrink wrap. Please note that this shrink wrap does
not contain any flame retardant compounds. It is possible for
the shrink wrap to burn. Keep a fire extinguisher nearby at
all times.
Materials needed to shrink wrap a boat for outside winter
storage.
1. Shrink wrap
2. Woven cord strapping
3. 2” x 4” boards
4. Heat tool
5. Heat shrink tape
6. Vents
7. Hand saw
8. Measuring tape
9. Safety gloves and
glasses
10. Fire Extinguisher
11. Stapler
12. End Caps for each end of wooden uprights
Materials needed to shrink wrap a boat for transportation
to the dealer.
1. Shrink wrap
2. Hull or preservation tape and mineral spirits to remove
wax.
3. Heat tool
4. Vents
5. Fire Extinguisher
Steps in covering a boat for outside storage
1. Go around the boat to
determine if there are any unusual features to the vessel.
These would be outriggers, trolling motors, antennas, flimsy
windshields etc. These items must be noted so they can be
padded, or protected before the shrink wrap is laid over the
boat.
2. At the same time look for, and note, any damage that has
already occurred to the boat. Owners will blame any
imperfection on the shrink wrap crew. Support Structure
3. Whenever a boat is stored outside with a shrink wrap cover
it must have a support structure under the cover, with wooden
uprights, to keep rain or snow from sitting on the cover and
causing damage to the boat.
4. The first step in building a support structure is to run
woven cord strapping lengthwise on the boat from the highest
point at the bow, such as the top of the rails or lifelines,
to the highest point at the stern, which would be the stern
rails or cleats on top of the toe rail. This strapping must be
pulled extremely tight as it is the beginning of the support
structure. Once this strap is pulled tight a tape measure is
used to measure from the deck, directly behind the windshield
in the cockpit, to the top of the windshield. 9” must be added
to this figure and a 2” x 4” cut to this length (on wide beam
boats you may need a taller 2” X 4”). This will be one of the
wooden uprights that will give the cover enough slope to shed
rain or snow from it.
5. This previously cut board is then forced upright under the
rope/strap going lengthwise on the boat. It should end up
vertically just behind the windshield in the cockpit. Now a
strap must be run laterally (side to side) on the vessel so
that it runs over the top of the 2” x 4” and makes a cross
with the lengthwise rope/strap. These can be tied to the top
of the rails, cleats, trailer, or they can go around the
entire boat. This strap must be pulled tight as it is part of
the support structure and will help keep weight off the
windshield.
6. Once that is completed, the foredeck and cockpit are
measured and wooden uprights 6” taller than where the fore and
aft strap normally lies are inserted under the rope/strap.
Again, a cross strap is run over the top of each of these
boards. These uprights must be no farther than 7’ apart. The
number of uprights will vary depending on boat length.
7. The tops and bottoms of each upright must be covered with
Dr. Shrink’s End Caps to keep them from protruding through the
cover or having the base slip during the winter months.
8. This is now a good time to pad all sharp objects such as
windshield corners, cleats, antenna bases, etc. TAPE THE FUEL
VENTS AT THIS TIME! Call the boat builder if the vents can’t
be found. This is very important to eliminate explosions.
Again, this is not flame retardant shrink wrap. It can burn.
Keep a fire extinguisher near you at all times.
Measuring to determine shrink wrap size and installing
perimeter band
9. A tape measure is used to measure from the top of the
upright behind the windshield to however far down the side of
the boat you wish to install the cover. This number is then
doubled and it will give you the size of shrink wrap you will
need. (standard shrink wrap sizes are from 12’-40’). You must
also allow 6” of additional shrink wrap length on each side of
the boat to tuck around and under the perimeter band going
around the boat.
10. The next step is to install a perimeter band around the
boat which is used to hold the shrink wrap on the boat. There
are several method of attaching this band around the boat. One
is to run a rope/strap through the bow eye, around the boat,
and through the two eyes on the stern of the boat. This
rope/strap is then pulled tight. A Second method is to tie
loops, made of rope/strap, down from the cleats or stanchion
bases to the level that you wish to cover the boat. These
should be hung every 3’-4’ around the hull. The perimeter band
is them run through these loops and pulled very tight. A Third
method is to use the Dr. Shrink’s “stick-ups” which are
suction cups stuck around the hull of the boat, every 3’-4’,
which hold the perimeter band in place while you are tucking
the shrink wrap over and under it. A Fourth method is to tape
the shrink wrap to the hull with hull/preservation tape,
thereby eliminating any perimeter band at all. This is the
most common way for boat builders to attach covers.
Installing the shrink wrap
12. Once the support structure is in place, all sharp objects
padded, and the perimeter band is attached—or tape is going to
be used in place of the perimeter band, the shrink wrap can be
put on.
13. The proper size shrink wrap is now put on a roller at the
stern of the boat. Coming from the flat stern allows the wrap
to be pulled over the boat much easier than coming from the
bow end. The wrap is pulled over the boat making sure that
there is enough extra at the bow and stern to tuck around and
under the perimeter band. This will help hold it in place in
case the wind is blowing.
14. After the wrap has been pulled over and tucked at the ends
the rest of the wrap can be unfolded. There will pleats of
excess wrap at the windshield corners, corners of the stern,
and as the wrap goes from the bow aft. The pleats at the
windshield must be folded to the rear of the boat and tucked
over and under the perimeter band, or taped in place if there
is no perimeter band. This will assure that there is enough
wrap fore and aft and side to side.
15. Now the rest of the wrap can be cut 6” below the perimeter
band, or just taped onto the boat, if there is no perimeter
band. Once this is done all of the material can be tucked
around and under the band or taped around the hull.
16. After being tucked around and under the perimeter band the
heat tool is used to apply heat directly above the band which
heat welds the outside of the wrap and the piece tucked under
the band. As you come to pleats or seams these are heat welded
at the same time.
17. When the entire perimeter and pleats and seams have been
welded it is time for bands that go from the perimeter band
under the boat to the band on the other side. These keep the
material and perimeter band from rising as the shrink wrap
shrinks. If these bands are not used there is also a chance
that snow or rain sitting on the cover could raise the
perimeter band and allow these to pool up in the cover. This
could cause tremendous amounts of damage to the boat.
Shrinking the cover
18. Once the bands are on it is time to begin shrinking the
entire cover. It is important to first shrink around the boat
from the perimeter band, or taped line, to the rub rail on the
boat. Using the heat tool is very similar to spray painting.
The trigger is pulled as you move the heat back and forth, in
a horizontal fashion, across the shrink wrap. You should begin
at the lowest part of the cover and let the rising heat work
for you to start warming the plastic. The ultimate goal is to
have a tight top that will repel snow and rain, and this
method will pull additional slack out of the top so that it
will not take as much shrinking when you are ready for that
area.
19. The rest of the cover can be shrunk once you have
completed heating to the rub rail. Always start at one end of
the boat and work in the same direction around the boat. This
will give a tighter, more protective cover. Again, the
ultimate goal is a tight, wrinkle free cover that will shed
snow and ice.
Hole patrol and venting
20. It is very important to look over the entire cover for
holes, weak spots, or pleats that did not get heated enough.
These should be taped with heat shrink tape. Once the tape is
applied it should be warmed slightly to heat the adhesives and
then rubbed to remove any air bubbles. If a hole is bigger
than the tape that you have, then a piece of shrink wrap 3”
bigger than the hole should be placed over the hole and taped
around the entire edge area. Heat the tape with heat tool and
then shrink the patch. It will be good as new.
21. The last step is to ventilate the cover the Dr. Shrink’s
self adhesive vents. There should be anywhere from 3 to 10
vents attached to the most vertical surfaces around the boat.
By putting the vents around the boat you are causing cross
flow ventilation to occur. This will help eliminate any
moisture and mildew buildup.
Taping on covers for boat builders and dealers
1. Most builders tape their shrink wrap covers on and they
provide no support system on the top of the boats. These
covers are designed only for transportation and not for
protection against snow load or heavy rain damage. Some
dealers in southern states also use this method.
2. It is very simple to cover boats this way. First de-wax the
hull with mineral spirits where the tape will adhere to it.
All sharp objects are padded, the shrink wrap is laid over the
boat, the shrink wrap is trimmed and taped all around the
hull, then heat is applied to shrink it. Following that the
OEM’s usually patch holes and sometime vent the covers.
MACHINERY COVERING TIPS
SAFETY FIRST!
--Always watch the Dr. Shrink’s training video before
shrinking any objects.
--Never point the DS-789 at yourself or anyone else.
--Always wear safety gloves, long sleeves, long pants and
safety glasses.
--Do not use the DS-789 while under the influence of drugs or
alcohol.
Dr. Shrink’s DS-789 is a propane fired heat tool that works
extremely well for shrinking plastic sheeting, but it must be
used properly to eliminate accidents. The shrink wrap you will
be heating is not flame retardant unless it was specifically
ordered as such. Shrink wrap can burn. Keep a fire
extinguisher nearby at all times.
1. To begin using the DS-789 first hook the adjustable
regulator to the 20 lb. Propane tank making sure the
connection is tight. Turn the knurled knob on the regulator
clockwise until it stops—then back it off one complete turn.
2. Attach the hose connector to the regulator, again making
sure the connection is tight. Next connect the DS-789 heat
tool to the opposite end of the hose and tighten.
3. Before turning on the propane make sure all valves on the
heat tool are turned off. The valve nearest the hose is the
main gas inlet and the valve nearest the head of the heat tool
is for adjusting the pilot light.
4. Turn on the propane at the tank, then open the main gas
valve which is closest to the hose connection. Now the pilot
valve can be opened approximately one quarter of a turn—or
until you hear gas escaping. Do not open the pilot valve to
far or the DS-789 will not ignite. With the pilot valve opened
push on the piezo electric igniter located on the heat tool
head. There will now be a pilot light that burns continuously.
Adjust it so that the flame is about 3” beyond the head of the
DS-789.
5. To adjust the flame for actual wrapping, squeeze on the
trigger located on the handle. For close up work, such as the
heat weld around the base of the object you are covering, you
will not need the maximum amount of btu’s. Place a finger
under the trigger to help keep from squeezing the trigger
completely. When you are ready for shrink wrapping the larger
sections the maximum amount of heat may be used (see Dr.
Shrink’s training video for shrinking methods).
Logical steps in shrink wrapping
1. Walk around the object you are going to cover to look for
problem areas—it’s much better to do it now rather than when
you are shrinking. Ascertain what sharp areas may need to be
padded to keep the wrap from tearing, or areas that need to
protected against excessive heat (electrical panels, hoses,
etc.). Also decide how far down the object you will cover and
how you will attach
the shrink wrap.
2. Pad the areas you previously discovered and measure the
object to see what size wrap will work well for you.
3. Bring the shrink wrap over the object (put the wrap on a
roller and do not let it drag on the floor or ground as it
will pick up dirt).
4. Form pleats at the corners and where excess wrap is
apparent (see video to view how pleats are made) and tape in
position until you can heat weld them.
5. Run strapping around base of object to be covered making
sure that 6” of shrink wrap lies below the strap (trim excess
so that there is no more than 6”). Tighten strap with buckles
and tensioning tool until it is extremely tight.
6. Now use the DS-789 to heat weld the shrink wrap around the
base of the object to be covered. This is accomplished by
flipping the wrap below the strapping up and applying heat to
form a heat weld (watch video for techniques).
7. As you are heat welding the base also seal the pleats with
the DS-789 heat tool (also shown on the training video).
8. Once the heat weld around the base and the pleats are
sealed the entire unit may be shrunk. Begin above the bottom
heat weld and Shrink upward. Use strokes similar to spray
painting—letting off the trigger at the end of each stroke.
Try and heat each area of the wrap only one time. Hit it hard
and move on. Do not use a small amount of heat so that the
heat tool must be moved over the wrap several times to get it
shrinking. This thins the wrap rather than shrinking it.
9. After you have shrunk the entire surface go over the unit
and check for holes and pleats that have come apart. Use tape
to repair small holes and to seal the loose pleats. To repair
larger holes take a piece of scrap 2” larger than the hole and
tape it over the hole. Lightly Shrink it using the DS-789 to
tighten it.
SHRINK WRAPPING SAILBOATS
PLEASE NOTE THAT
SAILBOATS PAINTED WITH AWLGRIP® OR IMRON® SHOULD NOT BE SHRINK
WRAPPED,
UNLESS
THE COVER COMES JUST BELOW THE GUNWALE AND THE PERIMETER BAND
IS SEPARATED FROM THE HULL BY FOAM BLOCKS.
MAST DOWN
Shrink wrapping a sailboat with the mast down uses many of the
same principles explained on the Dr. Shrink’s “Wrap it up
Video” which is included with your DS- 789 HEAT TOOL KIT.
Before beginning the covering process please view the
videotape at least twice to familiarize yourself with all
steps.
Note: Shrink wrap does
not contain any flame retardant compounds. It is possible for
the shrink wrap to burn. Keep a fire extinguisher nearby at
all times. When covering
a sailing vessel, mast down, the following steps must be
followed:
1. Run strapping fore and aft on the boat from the highest
point on the bow (pulpit) to the highest point on the stern
(stern rails). Tighten this strap with a buckle by using the
included buckle installation instructions.
2. Once the strap is tightened you may begin measuring the 2”
X 4” wooden uprights that will form your support structure.
These wooden uprights are forced under the fore and aft
strapping and will give the shrink wrap cover the necessary
pitch to allow snow and rain to run off. One upright will be
needed in the cockpit and then every 5’-6’ until the bow is
reached. If possible the upright should be lined up between
stanchions so a woven cord strap can be run laterally from the
top of the stanchion across the top of the upright to the top
of the opposing stanchion (this strap will give additional
support to the cover and also help keep your upright from
falling down). The height of the uprights will vary with
different boats, but when complete the center strap must be at
least 18 inches higher than the top of the stanchions. Again,
this will give the cover enough slope to allow snow and rain
to run off .
3. Now, staple the strapping onto the top of the upright where
it crosses the fore and aft strap (An Arrow T-50 stapler works
great). Pad the tops of the uprights as shown on the “Wrap it
up Video”.
4. Once this is completed the rest of the covering process can
be done by following the steps on the videotape.
MAST UP
Covering a sailboat mast up can seem like a very daunting
proposition at first, but it takes only a couple of more steps
than shrink wrapping a mast down boat. Follow the directions
below and watching the training video at least twice will
minimize any problems.
1. Install your strapping fore and aft on the boat from the
highest points at the bow and stern. The strapping will be
tied around the mast from the stern, and then around the mast
from the bow (if the boom is left on it can become part of the
support structure aft of the mast, but you must put a 2” X 4”
upright under the rear of the boom to give it strength). Pull
the strapping tight as you normally would, measure and install
your wooden uprights as on a mast down boat, put your lateral
straps over the wooden uprights, or boom, and pad them.
2. Install the perimeter band following directions on the
“Wrap it up Video”.
3. Go aboard the boat with a 25’ tape measure. Measure from
the mast back to the farthest point aft (top of the stern
rail). To this figure add 2 feet which will be forward of the
mast and 4 feet that will drape over the stern (a total of 6
extra feet).
4. Now measure from the mast forward (top of the bow rail or
pulpit). To this figure add on 2 feet which will extend aft of
the mast and 4 feet that will drape over the bow (a total of 6
extra feet).
5. Next cut your roll of shrink wrap the measurement length
from the mast back. Roll it up and take it onto the boat. Lay
the roll on your support structure or boom and open it enough
to measure and find the center of the wrap. Make a 2’
lengthwise slit in the shrink wrap at the center of the
material. This slit area will be wrapped around the mast to
form a collar. Once you have a collar formed, take the roll of
heat Shrink tape and go around the collar twice very tightly
(do not tape the shrink wrap directly to the mast as there
might be an adhesive residue in the spring).
6. Unroll the aft section of shrink wrap towards the stern (do
not unfold its entire width yet, as the wind might catch it).
Go aft as far as possible, until you run into the aft stays.
Now you can unfold the shrink wrap and have it lay as straight
fore and aft, and side to side, as possible. Using your wrap
cutting knife make slits in the shrink wrap up to the stays
and halyards. They should be
neat. Use strips of heat shrink tape to seal them (press the
tape down firmly to remove all air bubbles).
7. Trim and tuck the shrink wrap under the perimeter band on
the boat so that wind doesn’t catch it.
8. Now the shrink wrap piece at the bow can be attached. It is
done in a similar fashion as the aft piece. Put the measured
piece of wrap just forward of the mast, find the center of the
shrink wrap, slice into it 2 feet, make a collar around the
mast tightly tape around it. Unroll the wrap towards the bow
up to the forestay. Slice the wrap to the forestay and roll it
over the bow. Tape the slit together and unfold the shrink
wrap.
a. Run a strip of tape from the mast down to each side of the
shrink wrap where the forward and aft pieces meet. Use the
heat tool to warm the adhesives in the tape and actually heat
weld the pieces of shrink wrap together.
b. Trim and tuck the forward piece under the perimeter band.
Complete the shrink wrap job as shown on the “Wrap it up
Video”. Remember to do a complete “Hole Patrol” on the cover
when you are done shrinking—and also install enough vents to
give you cross-flow ventilation throughout the entire boat.
Thanks for using the Dr. Shrink’s “Wrap it up Kit”.
**FREIGHT
NOTE: most of Dr
Shrink's products ship promptly
(same or next business
day)
by parcel (i.e. UPS or FedEx),
while the heaviest items must ship by freight carrier.
Please note that freight
carrier shipping takes longer to prepare (ALLOW 2-3 DAYS FOR
PROCESSING FREIGHT CARRIER ORDERS) and costs more (the weight
of the pallet adds to the shipping cost). Freight carriers
generally require someone to be present to INSPECT and accept
delivery.
You may be able to purchase 2
or 3 smaller rolls that ship by parcel instead of freight
carrier, which gets the product to you more quickly, can get
you more product for your money, and can be easier for you to
handle. On the
shrink wrap order page,
each shrink wrap roll is notated as to how it ships (parcel or
freight carrier). |