DO YOU NEED WAX, PVA, OR AN ADDITIVE?
here is some more info on each option:
Gelcoat won't cure properly on its own because it needs help to overcome 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.
Topcoat Additive - Easiest Option
Add Clear additive topcoat directly to your gelcoat (50/50 ratio) This gives you 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!)
Surfacing Agent - Classic Approach
Surfacing agent at a 4% add is a classic method for creating a barrier to the air to allow the gelcoat to cure.
PVA - 2nd APPROACH
Apply PVA after your gelcoat cures and is tack free to help with mold release.