Dap 18814 Concrete & Masonry Sealant, Polyurethane, Grey, 10.1 Oz.

DAP Concrete & Masonry Sealant is a one-part, moisture-curing, commercial-grade polyurethane sealant designed to provide a long-lasting, waterproof seal when filling exterior gaps, joints and cracks in concrete, stone and masonry. This high-performance sealant remains permanently flexible, allowing it to withstand joint movement without tearing or failing, making it ideal for applications where structural stress and seasonal expansion are concerns.

Whether you're sealing foundation cracks, joints in sidewalks and patios, driveway gaps, or stone work, this polyurethane sealant delivers superior adhesion to a wide variety of substrates while resisting water penetration. Its exceptional cut and tear resistance means it can handle foot traffic and vehicle traffic alike, and it performs reliably both above and below the waterline. The sealant is paintable, allowing you to match your existing surfaces, and it carries a 50-year durability guarantee for long-term peace of mind.

Features and Benefits

• Superior Flexibility: Withstands up to 70% total joint movement, preventing cracks and failure in dynamic applications.
• Excellent Adhesion: Bonds reliably to most substrates commonly found in concrete and masonry work.
• Tough and Durable: Exceptional cut and tear resistance handles both pedestrian and vehicle traffic without degradation.
• Waterproof Performance: Forms a permanent, weatherproof seal that resists water penetration in exterior applications.
• Paintable: Can be painted over once cured to match surrounding surfaces and finishes.
• Long Service Life: 50-year durability guarantee provides lasting protection for foundations, joints, sidewalks, patios and driveways.

Specifications

• Brand: Dap
• Model: 18814
• Size: 10.1 oz. cartridge
• Color: Grey
• Type: Polyurethane
• Cure Method: Moisture-curing, one-part
• Joint Movement Capability: Up to 70% total joint movement
• Standards: Meets ASTM C 920, Type S, Grade NS, Class 25; Federal Spec TT-S 00230C, Type II, Class A
• Durability: 50-year durability guarantee