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309 Gelcoat Plus (Cures Tack Free)

  • 309 GELCOAT PLUS is an “air dry” gelcoat used for re-gelcoating, 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 Duratec 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. Use Preval Sprayer (pg.21) for gelcoat patching
  • 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 an 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 progressively to finer grits, finish with a wool buffing pad and 3M Super Duty Buffing Compound.
This Post Has One Comment
  1. 309 plus (or 309W as I have also seen it). Can multiple coats be applied by brushing, or would have to use 309 (no wax) for the first coat and use 309 plus for the final coat for tack free finish. Can non skid be used with this product?

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