Flex Seal Liquid - Waterproof Rubber Coating Sealant | 1 Gallon Clear

Flex Seal Liquid is a can of liquid rubber you can apply by brush, roll, dip, or pour. The clear formula is designed to create a flexible, waterproof coat that seals out water, air, and moisture while staying pliable as surfaces move with temperature changes.

What it is best at

This coating combines the familiarity of a paint-like application with the resilience of rubber. It adheres smoothly, covers quickly, and dries to a clear, flexible layer that resists ultraviolet light and remains resilient in changing conditions.

Key benefits at a glance

• Liquid rubber in a can enables multiple application methods: brush, roll, dip, or pour
• Watertight, flexible coating for a broad range of surfaces
• Smooth application that covers fast and seals out water, air, and moisture
• UV resistant to help maintain coating integrity in sun-exposed areas
• Prevents rust and corrosion on metal and offers chemical resistance

Where you might use it

• Roof repairs, sealing seams and penetrations, and protecting flashing
• Basement walls and masonry to deter dampness and surface moisture
• RV, camper, and trailer exteriors to reduce water intrusion and extend life
• Marine applications for decks and hull areas needing a flexible seal
• EPDM roofing and other rubber surfaces that benefit from a protective layer

Tips for best results

Prepare the surface per manufacturer instructions, apply in clean, dry conditions, and observe cure times for a flexible finish. Remember, while the coating is designed for protection, outcomes vary with surface condition and climate.

With Flex Seal Liquid, you get a clear, flexible barrier that adapts to your project—whether you’re patching a roof, stabilizing a basement wall, or protecting a boat trailer. It’s a practical option for homeowners and DIY enthusiasts seeking a versatile sealant without heavy equipment.