PVC Fabric Repair Procedures (Hypalon Fabric Gluing
Recommended solvent: MEK (methyl ethyl ketone). It is
often available at paint, hardware or plumbing stores, sold as a cleaner
for PVC pipes or lacquer thinner. For non-critical bonds you might
Glue: Zodiac #7097 Universal Glue; Polymarine
Urethane (PVC) Glue. Do not use Avon Adhesive (one
or two part) or BostikŪ or other Hypalon or rubber glues. They
will not work on synthetic materials.
1. Atmosphere: Glue with humidity less than 70%; and not in direct
sunlight; Temp. 64° to 77°F is best.
2. Preparation: Gather rags, glue brush; solvent; timer with
second hand or stop watch; make sure all the old glue is cleaned off;
get your patch cut out,
position noted and marked. It always leaves a neat tidy finish if you
tape off the perimeter of the patch area with masking tape to avoid
over glue. (If you need more details on this
part, read these general tips)
3. Mix accelerator and glue thoroughly either now or while
waiting between the solvent wipes below. Accelerator is toxic; keep
off skin. Keep mixed glue covered (foil or wax paper) when not using.
Pot life is about 1 hour. It may still look liquid, but will have lost
Cleaning (3 times - to prepare the fabric for a chemical bond with the
Scrub both sides (boat and patch or accessory) with MEK on a rag to
clean surface. Be careful not to wipe the MEK on areas of the boat or
patch that will be seen as MEK will make the fabric sticky and shiny.
Use masking tape around the perimeter to minimize this. Wait 5 minutes
after the first MEK wash. (time it)
and accelerator while waiting, if not done already.
Apply two more solvent wipes with 5 minute waiting time (timed)
You are preparing the fabric for glue adhesion. Abrading
these PVC fabrics is not recommended or necessary.
Application (3 thin layers)
Apply a thin glue layer with stiff brush to both sides.
Aggressively work it into the fabric with the brush. If it looks too thin, it
is probably correct!
Wait five minutes (timed) If glue still looks wet, wait longer.
8. Repeat steps 6 & 7 (total of 3 layers with 5 minute open
9. Wait 10 minutes after third layer of glue.
10. Join the surfaces during the next 10 minutes. Start from one edge
and slowly lay the patch or accessory down onto the glued area.
all air bubbles and wrinkles from the center to the edges. On deflated
boat rub as hard as possible with smooth tool, e.g. the back of a
large tablespoon - force air out from between boat and patch. Careful
not to scratch the fabric.
and hard based accessories, deflate boat and press through from other
side to make sure of adhesion. Wipe off excess glue with solvent.
If over 10
minutes or if glue has spots of white haze the glue has picked up
moisture and you should try to "reactivate" it. With a clean
rag wet the glue surface with MEK but do not rub the glue off (one
quick swipe). Then assemble immediately. Press hard. For accessory on
inflated boat you can rub it down vigorously with a rag. Make sure
there is no MEK on the rag when using it to run down the part or
11. Wait at least 48 hours before use.
bond will continue to strengthen over next 7 days. Don't be tempted to
shorten the process. Don't cut this curing time short: your patch
could peel off like a Post It note!
12. Pressure test if you want to be sure. Blow it up to full
pressure. Leave it overnight.
13. Go boating!