Flex Seal Liquid White 1 Gallon – Waterproof Rubber Coating Sealant

Overview

Flex Seal Liquid is a versatile liquid rubber in a can that you can brush, roll, dip, or pour. The white 1-gallon formula provides a watertight, flexible coating designed to adapt to curved and irregular surfaces without cracking. It combines a breathable makeup with a durable exterior, making it a convenient option for a range of projects.

What it does

This coating is formulated to seal out water, air and moisture while maintaining flexibility as surfaces move with temperature changes or settling. It goes on smoothly, covers quickly, and forms a continuous barrier that can accommodate shifting joints and irregularities rather than cracking under stress.

• Watertight, flexible rubberized coating that adheres to many surfaces
• Goes on smooth and covers quickly, sealing out water, air and moisture
• Breathable layer that allows substrates to resist moisture while staying protected

Key benefits

• UV resistant for exterior applications—helps minimize sun damage
• Prevents rust and corrosion on metal surfaces
• Chemical resistant for challenging environments
• One-gallon size provides ample coverage for larger repairs
• Flexible application options: brush, roller, dip, or pour

Versatile uses

Designed for a wide range of projects, including roofs, basements, RVs, campers, trailers, and marine applications. The white finish can blend into many surfaces or serve as a protective top layer on masonry or EPDM substrates.

• Seal roof seams and exterior penetrations on sheds, campers, and trailers
• Seal cracks or gaps in basement walls and masonry features
• Coat RV and marine joints to create a protective, flexible seal
• Protect outdoor structures with a breathable, weather-ready coating

Real-life scenarios may vary with surface prep, climate, and application technique. Flex Seal Liquid offers a practical, do-it-yourself approach to weatherproofing, without promising guaranteed results in every situation.