Thoroughly cleans gelcoat prior to sanding or painting.Use to remove mold release agents, wax and other contaminants and thoroughly clean gelcoat prior to sanding or painting. Ensures proper adhesion and precludes the need for sanding bare fiberglass when used with Fiberglass No Sand Primer, Model 3821485. Can also be used to remove amine blush from clear epoxy and clean previously painted surfaces when prepping to repaint.Key FeaturesRemoves contamination, mold release agents and waxCleans previously painted surfacesIdeal for preparing inflatable boats for antifoulingLow V.O.C. fiberglass surface preparation