Flex Seal Liquid Rubber Coating Sealant — Waterproof, Flexible, UV Resistant (1-Gallon)

Meet Flex Seal Liquid: liquid rubber in a can

Flex Seal Liquid is a versatile rubber coating you can brush, roll, dip, or pour onto a surface. Once applied, it dries to a flexible film that seals out water, air, and moisture while accommodating surface movement. The finish is a neutral gray that blends with many exterior and interior textures, delivering a neat, uniform look without heavy procedures.

Designed for breathability and resilience, this coating balances a protective barrier with pliability, so it can flex as foundations, roofs, or panels shift with temperature and weather. It offers UV resistance to help preserve color and integrity when exposed to sun, while its chemical resistance adds a layer of defense against common cleaners and outdoor elements.

Core capabilities

• Brush, roll, dip, or pour—adapt to the project and surface with ease.
• Forms a watertight, rubberized coating that blocks water, air, and moisture intrusion.
• Goes on smoothly, dries quickly, and covers large areas efficiently.
• UV resistant to minimize sun-related wear over time.
• Low-maintenance protection that helps guard against rust and corrosion; chemical resistant for common exposure scenarios.
• Breathable film that remains flexible as surfaces expand and contract.

Where to use Flex Seal Liquid

• Roofs and roof leaks, gutters, and flashing applications.
• Basements, foundations, and masonry surfaces to deter moisture ingress.
• RVs, campers, trailers, and marine gear where a flexible seal helps withstand outdoor conditions.
• EPDM and other exterior membranes requiring a tight, adaptable seal.

Size and color: gray, 1 gallon. Application tips include brushing, rolling, dipping, or pouring, with performance influenced by temperature and humidity. This product offers a practical, ready-to-use option for quick, flexible sealing across a range of surfaces.