The easy way to coat, seal, protect, and stop leaks fast!
Features and Benefits
Easy to use, portable, aerosol spray
Seeps into cracks and holes
Dries to a watertight, flexible, rubberized coating
Stays flexible and pliable, lasts for years
Will not sag or drip in summer heat
Will not crack or peel in winter cold
Stops vibrations and deadens noise
Protects surface from corrosion, use on wet or dry surfaces
Once dry, can be painted any color
FLEX SEAL is a rubberized coating that sprays out as a liquid, seeps into cracks and holes and dries to a watertight, flexible coating. It’s perfect for:
Roof Leaks, Gutters, RV’S, Campers, Mobile Home Roofs, Skylights, Vent Pipes, Flashings, Hoses, PVC Pipes, Windowsills, A/C Drip Pans, Portable A/C Units, Duct Work, Chimneys, Boats, Bird Baths, Ponds, Fountains, Downspouts, Flat Roofs, Metal Roofs, Foundations, Gravel Stops, Asphalt Shingles, Overlapped Seams, Drip Edges, rubberized and granulated roofs and so much more!
Q: How do I apply Flex Seal®
Read entire can. Wear face and eye protection, protective gloves, and clothing.
Make sure the area is clean, dry and free of grease, oil, and dirt.
Shake well: Spray 8” to 12” from surface using an even sweeping motion.
Apply several even coats until ALL cracks and holes have been filled.
Allow 24 to 48 hours to dry before applying another coat. Fully cures in 48 hours.
Use Flex Seal® ONLY in a well-ventilated area. When using inside, prevent vapor buildup by opening doors and windows. Ensure fresh air entry during application and drying. Do not use near heat, sparks, pilot lights or other sources of ignition.
Q: How long does Flex Seal® take to dry?
A: Dry time depends on the temperature, humidity and thickness of the coating. Flex Seal will usually dry to the touch within 2 to 3 hours and in 24 hours fully cure. Flex Seal® gets stronger over time.
Q: Can I use Flex Seal® in a basement, bathroom, closet or attic?
A: Use Flex Seal® ONLY in a well-ventilated area. When using inside, prevent vapor buildup by opening doors and windows. Ensure fresh air entry during application and drying. Do not use near heat, sparks, pilot lights or other sources of ignition.
Q: What colors does Flex Seal® come in?
A: Flex Seal® comes in Black, Clear, White, Brite, Gray, Red, Yellow, Terra-Cotta, Blue, Green, Almond and Brown. Once dry, Flex Seal can be easily painted any color.
Q: How much will one can of Flex Seal® cover?
A: Depending on number of coats and thickness, one Large 10 oz. can will cover up to 8 ft. One Jumbo 14 oz. can will cover up to 12 ft.
We recommend you spray the area using an even sweeping motion, let it completely dry and apply additional coats as needed. Several even coats are better than one coat and each time you recoat the surface you will continue to fill in any holes or cracks and the surface will be sealed.
Q: How long will it take to receive my order?
A: Shipping usually takes 2 to 4 weeks. Flex Seal® cannot be shipped overnight.
Q: How much pressure will Flex Seal® withstand?
A: Flex Seal® will withstand normal hydrostatic water pressure such as rainwater, but it is not made to withstand extreme pressure.
Q: What will Flex Seal® adhere to?
A: Flex Seal® will adhere to most any surface such as: wood, metal, tile, concrete, masonry, fabric, glass, plastic, aluminum, porcelain, dry wall, rubber, cement, some vinyls and so much more! Flex Seal® may not be compatible with all plastics, vinyls, or rubbers.
Q: Can I apply Flex Seal® on a wet surface?
A: Flex Seal® can be applied on a wet surface, or moist environment in the event of an emergency. However, Flex Seal® will always adhere better to a clean, dry surface. To ensure its longevity, we recommend you reapply Flex Seal® once the area is completely dry.
Q: Can I apply Flex Seal® when it is raining?
A: You can apply Flex Seal® during a light rain. However, Flex Seal® may take longer to dry and, a strong downpour may wash away the FLEX SEAL®. To ensure its longevity, we recommend you reapply Flex Seal® once the area is completely dry.
Q: How long will Flex Seal® last?
A: Depending on the environment, coats added and maintenance, many people have found Flex Seal® will last for years without cracking, peeling or losing any of its strength or sealing properties.
Q: Will Flex Seal® dry out, crack or peel?
A: NO, Flex Seal® will not dry out, crack or peel. It stays flexible and pliable.
Q: Will Flex Seal® sag or drip in the summer heat?
A: NO, Flex Seal® will not sag or drip in the summer heat.
Q: What is Flex Seal® made of?
A: Flex Seal® is a thick, durable, mastic rubberized coating that is specially formulated to spray out as a liquid, seep into cracks and holes and dry to a watertight, flexible, rubberized coating.
Q: Can I paint it on or brush it on instead of spraying?
A: YES, you can spray the Flex Seal® directly into a bowl and paint it, brush it or roll it on any area. Once dry, recoat as needed.
Q: Can I use Flex Seal® to seal the inside of a water tank used for drinking?
A: NO, we do not recommend that you use Flex Seal® where it comes in direct contact with drinking water.
Q: Can I use Flex Seal® to fix radiators, tires or other areas with extreme heat and pressure?
A: NO, Flex Seal® is not made to withstand extreme heat or pressure.
Q: Can I use it on a gasoline tank?
A: NO, Flex Seal® should not be used to seal a gasoline tank, oil tank or any other flammable material.
Q: Is Flex Seal associated with GAF?
A: NO, Flex Seal® is not affiliated with GAF and is not intended for use by Professional Roofers.
Q: Is Flex Seal® Clear the same formula as Flex Seal® Original and Flex Seal® Brite?
A: Flex Seal® Clear coats, seals, protects and stops leaks fast! However, in order to give Flex Seal® Clear its amazing transparency, we had to make some adjustments to our formula. Therefore, Flex Seal® Clear will be slightly thinner and multiple, even coats may be needed to get the job done.