Flex Seal Liquid Rubber Sealant is a spray-applied coating that seals leaks fast and protects surfaces from water damage. This thick liquid sprays directly from the aerosol can, seeps into cracks and holes, and dries to a flexible, watertight rubberized coating. It’s effective for roof leaks, gutter damage, window trim gaps, pipes, and concrete cracks.
Unlike paint or standard caulk, Flex Seal’s flexible rubber formula stays pliable in temperature extremes and won’t crack in cold or peel in heat. It seals out water and remains effective for years, making it a practical choice for ongoing home maintenance and repairs.
Features and Benefits
- Easy Aerosol Application: The portable spray can applies quickly and evenly, covering large areas with the convenient nozzle.
- Flexible Rubberized Coating: Dries to a watertight, elastic finish that remains pliable and flexible while protecting surfaces.
- Works on Multiple Materials: Bonds to wood, metal, tile, concrete, masonry, fabric, glass, plastic, aluminum, and rubber surfaces.
- Multi-Purpose Sealing: Ideal for roofs, gutters, downspouts, PVC pipes, window sills, foundation cracks, driveways, and more.
- Temperature and Weather Performance: Stays flexible in extreme heat or cold and remains unaffected by weather conditions.
Specifications
- Brand: Flex Seal
- Model: FSGRYR20
- Size: 14-oz. aerosol spray can
- Color: Gray
- Type: Liquid rubber sealant coating
- Application: Spray
How to Use
- Application Method: Spray a larger area than where the leak is and feather the edges.
- Deep Cracks: For deep cracks, apply several light layers rather than one heavy coat.
- Conditions: Use at can temperature above 60°F and ensure Flex Seal has filled all cracks and holes and is fully cured before testing.
WARNING: This product can expose you to chemicals including Titanium Dioxide, which is known to the State of California to cause cancer, and Toluene, which is known to the State of California to cause birth defects or other reproductive harm. For more information go towww.P65Warnings.ca.gov.








