Flex Seal Liquid Rubber Coating Sealant – Waterproof, Flexible, UV Resistant (32 oz)

Overview

Flex Seal Liquid is liquid rubber in a can that you can brush, roll, dip, or pour onto a wide range of surfaces. The 32 oz bottle delivers a flexible, watertight coating that bonds to many materials and remains pliable as conditions change, helping keep out water, air, and moisture.

Why it works

This coating goes on smoothly, forming a seamless layer that moves with the surface rather than cracking or peeling. It carries UV resistance to help protect exposed exteriors, while also resisting rust and corrosion and standing up to chemical exposure. The result is a versatile solution you can use on both indoor and outdoor projects without heavy special tools.

• Watertight and flexible protection for roofs, basements, RVs, trailers, and marine surfaces
• Smooth application that covers quickly and seals out water, air and moisture
• UV resistant finish to help reduce sun-related wear
• Rust and corrosion resistance with chemical resistance for durability

• Easy application with brush, roller, dip, or pour for versatility
• Works on EPDM membranes, masonry, metal, and other common substrates
• Breathable coating option that helps manage moisture under the coating

Practical uses and tips

Use Flex Seal Liquid on both flat and curved surfaces. Start with a clean, dry area and apply in thin, even coats. For larger gaps or higher exposure areas, consider additional coats. The result is a flexible layer that can adapt to temperature shifts and movement without losing adhesion.

Common projects include sealing roof seams, waterproofing basement penetrations, and protecting exterior surfaces on boats, RVs, and masonry walls. The coating’s versatility makes it suitable for quick repairs or longer-term weatherproofing without specialized equipment.

Pro tip: prepare the surface and test a small area first to confirm adhesion and drying times before broader use. Flex Seal Liquid is a practical choice for DIY weatherproofing when a flexible, durable seal is needed, and while it supports many applications, it’s best used as part of a broader maintenance plan rather than a guaranteed fix for every condition.