Flex Seal: How Long Will It Last?

Flex Seal is a rubberized sealant that can be used to seal cracks and holes in various surfaces. It is a rubber-like material that is applied as a liquid and then dries to a flexible, waterproof seal.

While Flex Seal won't last forever, it can last for many years if applied correctly—and if the surface is not subject to too much wear and tear.

It can be used on everything from gutters and roofs to boats and RVs. Flex Seal can last for a long time without cracking or peeling, and it can withstand extreme temperatures and weather conditions.

How is Flex Seal applied?

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Flex Seal is applied by painting, spraying, or squeezing it on the desired surface. It’s best to apply Flex Shot to a clean, dry surface, and let it cure completely (for 24-48 hours) before touching or painting it.

How long will Flex Seal last on a roof?

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Flex Seal typically lasts for several years on a roof. However, it is important to note that the specific lifespan will depend on a number of factors, such as the type of roof, the climate, and the amount of sunlight exposure.

What temperatures can Flex Seal withstand?

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This varies depending on the specific Flex Seal product you're using. Here are the safe temperature ranges once Flex Seal is cured for some of the most popular varieties:

Flex Paste-40°F to 200°F
Flex Glue-40°F to 200°F
Flex Tape-70°F to 200°F
Flex Seal Liquid-80°F to 350°F
Flex Seal Spray-20°F to 140°F

Tips for prolonging the life of Flex Seal

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Flex Seal can last for many years if it is properly cared for. Here are some tips for prolonging the life of Flex Seal:

  • Store Flex Seal in a cool, dry place. Flex Seal Liquid will last 24 months when properly stored.
  • Avoid exposure to temperatures outside the recommended ranges, as this can cause the seal to degrade.
  • Inspect Flex Seal regularly for any signs of damage or wear.
  • If Flex Seal does become damaged, repair it as soon as possible to prevent further damage and retain its sealing properties.

Closing thoughts

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Flex Seal is a great product for sealing leaks and cracks, but it is not permanent. It can last for many years, but only if the surface is properly prepared and the Flex Seal is applied correctly. Eventually, it will need to be repaired or replaced.