Flex Set is a non-sagging, non-shrinking, sandable, paintable, and chemical-resistant, flexible epoxy adhesive. It seals and bonds PVC, fiberglass, wood, metal, glass, ceramic, and dissimilar materials. Able to be applied above or below the waterline, Flex Set can be used to bond and seal deck and hull joints, make underwater repairs, install thru-hull fittings, attach rub-rails and wood trim, bond ABS, Lexan, and other difficult materials, and for many other uses. No measuring needed. The plunger dispenses the correct 1:1 ratio every time.