Elasto Patch, Elastic White Roof Patch is an extra tough, flexible repair compound designed to patch splits, cracks and holes in roof surfaces. This water based patch dries quickly to a non-tacky surface which offers great adhesion to all coatings applied over it. It is designed to repair cracks and holes up to 1" in width. Elasto Patch should be used with Seam and Repair Fabric. Elasto Patch remains flexible while it expands and contracts with your repair, making it ideal to use with all Elasto Patch products. Do Not Allow Stored Product To Freeze.