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DuPont Driveway and Repair Sealant made with Kevlar is a high quality acrylic sealant is designed for those special projects where a black caulk crack filler is needed. Delivering excellent adhesion and durability, this black caulk crack filler forms a flexible, water-resistant seal that offers protection from environmental conditions. DuPont Driveway and Repair Sealant made with Kevlar is designed for filling and sealing cracks and non-structural gaps. It is an excellent product for general household repair requiring a black sealant.