Gorilla Waterproof Patch & Seal Liquid is a flexible, rubberized coating that seals out water, air and moisture. Application is easy. It can be applied by brush, roll, trowel, dip or pouring. Once applied, the self leveling formula smoothly covers small gaps and cracks ensuring a watertight seal. When dried, Gorilla Waterproof Patch & Seal Liquid is paintable and temperature 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!