Flex Seal Liquid: Rubber Coating Sealant — Waterproof, Flexible, UV Resistant for Roofs, Basements, RVs, Marine and Masonry (1 Gallon)

Introducing Flex Seal Liquid

Flex Seal Liquid is liquid rubber in a can, ready to brush, roll, dip, or pour onto surfaces. It creates a flexible, rubberized coating designed to seal out water, air, and moisture. The film forms smoothly for a seamless finish that adapts with temperature changes and surface movement, making it a practical choice for a variety of home, vehicle, and outdoor projects.

In addition to its waterproofing capabilities, this coating is UV resistant, helping maintain color and integrity when exposed to sunlight. It also offers rust and corrosion resistance and stands up to many common chemicals, supporting long‑lasting protection where moisture or exposure is a concern.

Key benefits at a glance

• Watertight, flexible rubberized coating that moves with irregular surfaces.
• Versatile application options: brush, roll, dip, or pour for fast coverage.
• Dries to a smooth film that seals out water, air, and moisture.
• UV resistant for outdoor durability and color retention.
• Helps reduce rust and corrosion; chemical resistant for varied environments.

Popular uses and substrates

• Roofs and flashing, leaks around seams, skylights, gutters.
• Bases and foundations to block moisture intrusion.
• Exterior surfaces on RVs, campers, trailers, and marine gear.
• EPDM roofing, masonry, and other common outdoor materials.
• Anywhere a breathable, flexible rubberized coating is beneficial.

How Flex Seal Liquid works in practice

Apply to a clean, prepared surface to form a continuous protective layer. The coating dries to a pliant, weatherproof film that resists moisture while remaining flexible enough to accommodate surface movement. Its UV resistance helps maintain a clean appearance over time, and the chemical resistance supports durability in mixed environmental conditions.

Tips for best results

• Prepare the surface by removing dirt, oils, and loose material for better adhesion.
• Shake well and apply in even coats; avoid puddling for a uniform finish.
• Reapply as needed to extend protection on high‑traffic or exposed areas.