BLACKTOP & ROOF BUTYL RUBBER ASPHALT - Forms an extra tight seal, remains flexbile, water resistant, resists cracking, solvent clean up. This sealant provides a durable, flexbile and weather resistant seal for cracks and joints in asphalt driveways, parking lots and more. It is also ideal for waterproofing, repairing and sealing roofs, shingles, and flashing around chimneys and skylights. It provides excellent adhesion and prevents water and frost damage. USE ON: Blacktop driveways, roofs, chimney flashings, expansion joints, parking lots, shingles and skylights.