A unique, light-activated fiberglass-reinforced polyester self-adhesive repair patch. Just cut, peel, and stick - the patch has excellent adhesion. It cures in about 10 minutes in UV light (sunlight, or a UV flashlight) and within an hour you can drill, tap, sand and paint it. It doesn't shrink or expand during application or after curing, and bonds to all surfaces except polypropylene. It's flexible and waterproof and the resulting patch is extremely durable. Use it on canoes, paddle boards, jet skis, pools, tanks, pipes, bumpers, exhaust leaks, windows, wood, concrete.... the possibilities are endless!