Gorilla Waterproof Patch & Seal is a flexible, rubberized coating that seals out water, air and moisture. Once applied, the self leveling formula smoothly covers small gaps and cracks ensuring a watertight seal. When dried, Gorilla Waterproof Patch & Seal is paintable and temperature/UV resistant resulting in lasting repairs. Use on: roofs, gutters, skylights, flashing, chimneys, PVC pipe joints, windows, RVs, DIY projects and more. Great for: metal, concrete, wood, aluminum, brick, tile, fabric, rubber, glass and more.