Gelcoat Application Guide For a Mold

* 304, 206,307, 308 GELCOATS ARE DESIGNED FOR USE IN A MOLD AND WILL
   NOT CURE "TACK FREE."

* In a mold that has been prepared with mold release, apply 15-20 mils (check
   with wet film thickness gauge) of gelcoat with a brush, roller, or spray gun.

* Gelcoat is quite thick so take care to apply as even a coat as possible, taking
   more care with a brush or roller. Too thick may distort and pull away from the
   mold as it cures, too thin, it will be attacked by the resin/glass build-up
   laminate causing it to crinkle up or "alligator."

* Ventilate or fan the gelcoat while it is curing to remove the styrene vapor which
   can cause the gelcoat to cure unevenly and pull away from the mold creating
   unwanted waves in the finished part.

* As soon as the gelcoat is cured (so that is doesn't come off on your fingers) it's
   time to back up the gelcoat with a laminate.

* Apply a layer of .75 or 1.5 oz mat with polyester or vinylester resin. Once
   stabilized with the cured "backup" layer, proceed with the rest of the laminate.

309 Gelcoat Plus (Air Dry Application)

* 309 GELCOAT PLUS is an "air dry" gelcoat used for regelcoating, refinishing or
   as a finish coating over a polyester or vinylester fiberglass laminate.

* Can be sprayed, brushed, or rolled onto a sanded gelcoat or a sanded primed
    surface (use Fourseal Primer).

* When a smooth gloss finish is required, spraying is the best application method.
   Use a siphon spray or HVLP spray gun with a larger tip, suitable for primer.

* To spray, catalyze and thin 15-30% with acetone and strain before loading the
    spray gun.

* Spray thin coats (2-3 mils) and allow acetone to evaporate for 1-2 min. before
   applying the next wet coat to that area.

* Continue to apply wet coats until a wet film thickness of approximately 20 mils is
   achieved. Then let cure to a mat finish that usually has a orange peel texture.

* The gelcoat then can be wet sanded and buffed to a gloss finish. Start with 400
   or 600 grit on a rubber sanding block and progress to finer grits. Finish with a
   wool buffing pad and a buffing compound.

As a Rule of Thumb: For One Quart (32 oz) of Resin:

MEKP %      Approx. cc      Approx. Teaspoon      Approx. Liquid oz
   1.00                    10                                2                                     1/3
   1.50                    15                                3                                     1/2
   2.00                    20                                4                                     3/4