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DAP Extreme Stretch Acrylic Urethane sealant is a versatile, premium elastomeric waterproof sealant ideal for sealing a wide range of interior and exterior applications. Extreme Stretch sealant stretches over 600%, seals gaps up to 3" wide and provides superior adhesion for a long lasting, crackproof seal. Its unique acrylic urethane formula is 100% waterproof, making it perfect for caulking and sealing windows, doors, trim, siding, gutters, flashing, sinks, and countertops. DAP caulk and sealants provide durable performance for a variety of projects.