Step 1: Etching
(Scuffing) Before application of the KeelGuard, the
fiberglass mold release agents and wax must be removed. This step is
extremely important and must be done thoroughly so that the full
bonding qualities of the 3M adhesive can be realized. The removal of
the release agent or any other contamination is best accomplished by
using the 3M Scotchbrite pad provided in each kit. Etch or scuff the
keel surface where the guard is to be installed. This helps give 3M’s
adhesive a better mechanical bond. The supplied pad is a mild grit and
will not damage the keel’s gel coat or paint. If you have access to a DA
sander, this can be used instead of the Scotchbrite pad. We recommend
not using anything stronger than a 180 grit sand paper.
Step 2: Cleaning
After etching the hull, follow-up by thoroughly
cleaning the area with alcohol, acetone, toluene, or zylene. The keel
should be wiped thoroughly with clean rags or paper towels, and then
re-wiped with another clean rag or paper towel using one of the above
recommended agents. Other solvents such as Acry-Lac cleaner, Liquid
Sandpaper and Interlux 202 or other wash solvents containing Xylene
or Toluene with Alcohol may be used.
Do not
use paint thinner or other
petroleum based cleaners as they will leave a film, and compromise the
bond to the adhesive. Always remember to wear rubber gloves and read
the manufacturers safety precautions when using these solvents.
Step 3: Priming
After thoroughly cleaning the keel area as outlined in
step 2, it is time to apply a very thin coat of the 3M #94 Keel Primer
provided in the kit. Follow the instructions attached to the applicator.
Make certain that the entire area where the KeelGuard will be
applied is primed, especially the edges.
The primer interacts with the
adhesive to create a bond that will become stronger over time. Do not
confuse the primer for a cleaning agent! This primer is clear and will
dry instantly. Do not over prime, leaving too little primer to complete
the job.
Step 4: Applying or Burnishing the KeelGuard
Before applying the
KeelGuard, it should be unrolled and set in the sun for approximately
10 minutes. This helps the KeelGuard become softer and more pliable,
making installation easier. Usually laying the KeelGuard over the bow
of the boat is enough to soften the material. If the KeelGuard is going to
be applied during cooler weather, we recommend taking the KeelGuard
indoors and unroll it until it lays flat and becomes pliable. The
KeelGuard should not be applied when temperatures drop below 60°
Fahrenheit.
