Flex Seal® Liquid

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Exclusively at Showcase For Canadians! The Easy Way to Coat, Seal, and Stop Leaks Fast!

Flex Seal Liquid is a proprietary formulation that starts out as a thick liquid and dries to a super strong, flexible, watertight rubberized coating. Flex Seal Liquid can be brushed, rolled, dipped or poured to create a high performance protective rubber barrier that blocks out air, water and moisture on a variety of surfaces and objects. Once cured, it forms a durable, breathable, weatherproof, non slip barrier that's resistant to rain, snow, sun, wind, hail, air, moisture, UV degradation, extreme temperatures and natural weathering!

How to Brush, Dip, Roll or Pour Flex Seal:

Protective clothing is recommended. Stir can well, do not shake. Make sure the surface is clean, dry and free of grease, oil and dirt.

For better adhesion, scuff surface with sand paper or steel wool. Coverage will vary depending on amounts of coats used.

  • Large 16 oz - approx. 20 Sq. Ft.
  • Jumbo 32 oz - approx. 40 Sq. Ft.
  • Gallon 128 oz - approx. 150 Sq. Ft.

Brush or roll Flex Seal Liquid using an even sweeping motion. Apply several even coats until the surface has been completely covered and all cracks and holes have been filled. Allow Flex Seal Liquid to dry 24 to 48 hours and apply additional coats as needed. Always brush or roll over a larger area than just where the leak occurred.

Dip object directly into the Flex Seal Liquid and make a slight swirling motion. Once the surface has been coated, remove and let any excess drip back into the can. Hang or clip the object in the same vertical position as it came out of the can and let dry.

Pour Flex Seal Liquid directly on the surface allowing gravity to take Flex Seal Liquid into cracks, holes and hard to reach areas. Continue to pour until the surface has been covered and all cracks and holes have been completely filled.


  • Liquid rubber in a can!
  • Brush, roll, dip or pour
  • Seals out water, air & moisture
  • Prevents rust & corrosion
  • Covers fast & excellent adhesion
  • UV, mildew & chemical resistant
  • Non-hazardous & food safe
  • Stops noise & vibrations
  • Expands & contracts
  • Can be painted any colour
  • Includes (1) can in selected colour/size

~ Please note that colours/sizes available online may differ from those available in-store.

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