GacoPatch is a flashing grade, standalone silicone roof patch designed to provide a long lasting solution for a leaking roof. Remains permanently flexible even under under ponding water. UV stable and will not chalk, crack, or peel. 1-step application eliminates the need for additional products such as primers, seam tapes, or top coats. Use on cracks, expansion joints, flashings, gutters, penetrations, pipes, pitch pans, seams, small holes, transitions, vents, and voids. Bonds to aged asphalt, aged EPDM, aged TPO/CPA, built-up, cap sheet, composite, concrete, fiberglass, metal, modified bitumen, torchdown, sprayed polyurethane foam, and most existing coatings. Excellent chemical resistance. Wide top pail makes application easy to do with a trowel or brush. 25 year limited warranty.