Epoxy Quik Stik contains a fading blue dye and becomes fiberglass white after mixing. It may be applied underwater in either fresh or salt water, and will bond to substrates such as fiberglass, epoxy, wood, glass and metal. Epoxy Quik Stik will not yellow when exposed to sunlight. It has a 30 minute cure time. Comes with sandpaper and hand cleaner, available in smaller convenient size.