Liquid Rubber Waterproof Sealant – DIY Leak Repair Coating (5-Gallon, Black) for Flat & Low-Slope Roofs, Foundations, Gutters

Liquid Rubber Waterproof Sealant: a flexible, durable coating for tough jobs

Liquid Rubber offers an industrial-strength bitumen formula that forms a seamless waterproof membrane across flat and low-slope roofs, foundations, gutters, concrete surfaces, planter boxes, and more. This premium sealant helps create a robust barrier where traditional sealants may fall short, making it a practical option for homeowners, property managers, and contractors tackling moisture challenges.

Why this sealant stands out

• Superior elasticity with over 950% elongation, maintaining adhesion as buildings move and temperatures shift.
• Delivers a flexible rubberized coating that resists cracking, peeling, and UV wear over time.
• Water-based with no VOCs or strong odors, suitable for indoor and outdoor use.
• Strong adhesion to metal, concrete, wood, and more, enabling broad material compatibility.
• Brush, roll, or spray application for both flat/low-slope roofs and vertical surfaces.

For best results, pair with Liquid Rubber Seam Tape or Geo-Textile to bridge joints, seams, vents, and penetrations where movement may occur. This creates a comprehensive waterproofing system designed for long-lasting leak repair and prevention on roofs, basements, and foundations.

Usage notes and real-world scenarios

Professionals and DIYers alike rely on Liquid Rubber for roof repairs, preventative maintenance, or basement waterproofing projects. Millions of gallons have been sold, reflecting confidence across residential, commercial, and rental properties. It is not designed for walking surfaces; its tacky cure supports low-traffic waterproofing in areas where a continuous membrane is needed.

• Typical coverage varies by surface and coat count: 3–4 coats on flat/low-slope roofs for a 60–80 mil membrane; 2–3 coats on vertical surfaces for about 30 mil.
• Designed for confined spaces and environments where odors or solvents would be disruptive.

To maximize performance, pair the sealant with compatible products like seam tape or geo-textile to bridge joints, seams, vents, and penetrations where movement occurs. This pairing helps create a cohesive waterproofing system suited for long-lasting leak prevention on roofs, basements, and foundations.