This remarkable two-part epoxy coating protects fiberglass hulls from water absorption. It's formulated with Microplates® that creates an overlapping water barrier. It's also great for repairing gelcoat that has been damaged by osmotic blistering. Excellent adhesion to fiberglass, composite, metal and woodSuitable for use above and below the waterline as a universal primer for all surfacesLong overcoating times add versatility & flexibilityQuart & Gallon Kits include Curing Agent