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YOUR FIRST CHOICE FOR RESIN, GEL COATS, AND FIBERGLASS
Easiest Option: Topcoat AdditiveSmooth, nearly "walk-away" finish | No need for PVA or wax Classic Approach: Surfacing Agent (Wax) Add to gelcoat at 4% ratio | Forms a barrier, allowing gelcoat to cure Learn More
Gelcoat won’t cure properly on its own because it’s inhibited by air exposure. You’ll need either wax or a clear additive to ensure it hardens. Wax creates a surface barrier for open-mold repairs (followed by sanding/polishing), while an additive chemically cures the gelcoat for closed molds or thicker layers. Choose the best approach based on your project’s mold type and desired finish.
Add clear additive topcoat directly to your gelcoat (50/50 ratio). This yields a smooth, nearly “walk-away” finish and eliminates the need for PVA or wax. (You can choose to add Topcoat to your gelcoat order, and we will do this process for you.)
Adding surfacing agent at 4% is a classic method. It migrates to the surface to create an air barrier so the gelcoat can cure.
Apply PVA after your gelcoat becomes tack-free to help with mold release and create an air barrier.
Remember: Catalyst (MEKP) is always required.
If you have any questions, please call us at (909) 923-2200.
This item is considered hazardous in volumes greater than gallon sizes and will include a special handling fee when ordered in individual units with volumes greater than a gallon. If shipped by air, this item will always require a special handling fee, regardless of volume.
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*Available for online orders only can not be combined with any other offer.