Flex Paste Super Thick Rubber Paste Sealant, 8.75 fl oz, White
Flex Paste Super Thick Rubber Paste Sealant, 8.75 fl oz, White
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Flex Paste Super Thick Rubber Paste Sealant, 8.75 fl oz, White

1,500 ratings
Flex Paste Super Thick Rubber Paste Sealant, 8.75 fl oz, WhiteFlex Paste Super Thick Rubber Paste 8 75 fl oz WhiteFlex Paste Super Thick Rubber Paste 1 lb ClearFlex Paste Industrial Sealant Thick Rubber Paste 8 75 fl oz Black
Actual ColorWhite

Key item features

  • Flexible Sealant: Dries into a strong, flexible rubber that expands and contracts with surfaces, creating a watertight barrier against air and moisture.
  • Versatile Application: Can be applied on dry or wet surfaces, including underwater, and will not dissolve or wash away.
  • Durable Finish: Once cured, it will not shrink, crack, or peel, and can be painted any color for a customized look.
  • Multi-Surface Adhesion: Works effectively on a wide range of materials such as wood, glass, tile, concrete, metal, and brick.
  • Repair Capabilities: Ideal for various repairs including roofs, plumbing, automotive, marine, and sealing cracks.
  • White Paste: Features an adhesive form of white paste sealant, suitable for DIY projects, arts & crafts, and hobbies.
  • Enhanced Adhesion: For best results, apply a generous amount with firm pressure to push out water, and etching the surface may improve adhesion.
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Customer ratings & reviews

4.1 out of 5 stars
stars
1,500 ratings862 reviews
How item rating is calculated
  1. 5 stars64% (963)
  2. 4 stars11% (167)
  3. 3 stars7% (107)
  4. 2 stars4% (61)
  5. 1 star13% (202)

Reviews summary

Pros

  • : The paste spreads smoothly and sets quickly.
  • : Forms strong seal on various surfaces.
  • : Paste sets within minutes to hours and allows painting.
  • : Forms strong, watertight seal in cracks and holes.

Neutral

  • : It forms a waterproof seal but may arrive hardened.
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Showing 1-3 of 862 reviews

May 10, 2020
Reviewer name: RedDog
5 out of 5 stars
5 out of 5 stars review

Seller Verified Purchase

Flex Paste - Fixes Shower Tub/Leak

We've had an on-going problem with our 20 year old fiberglass/gelcoat shower/tub. The leak started as a small hairline crack in the bottom and has grown to 2-3". Over the last 3 years I've patched it twice with the Gelcoat Repair Kits which last a while, but begin leaking again. I did some research and decided to give Flex Paste a try. I covered the leaking area with Flex Paste and have been leak free for a couple of weeks. It seems like a solid repair and we'll see how long it lasts. I like that I can spread the Flex Paste well beyond the crack.

Review from flexsealproducts.com
Helpful?40Z3T6QHW6C0534825972
reply from Flex Seal Family of Products Customer Care

Flex Paste is incredibly durable and we're confident that your bathtub will be leak-free for many years. Please feel free to message us directly by email if you have any questions (Humans@FlexSealProducts.com). Thank you so much for sharing your experience with us. Flex On!

Nov 26, 2022
Reviewer name: DJ Shawn
5 out of 5 stars
5 out of 5 stars review

Seller Verified Purchase

Coated Rusting Support Steel

I have a salt water pool and the coping support steel at the catch basins was rusting and flaking into the pool. I used flex paste to coat and seal it. Problem solved! #Flextacular

Review from flexsealproducts.com
Helpful?40Z3T6QHW6C0534825972
reply from Flex Seal Family of Products Customer Care

Hi there, thank you so much for sharing your Flex Success with us! We're happy to hear the Flex Seal Family of Products is working great for your projects and repairs. If you'd like some helpful tips and tricks for future DIY's, feel free to message us at Humans@FlexSealProducts.com. Flex On

Dec 5, 2025
Reviewer name: romieb3_8808
5 out of 5 stars
5 out of 5 stars review

Used it on everything!

[This review was collected as part of a promotion.] Flex Paste Clear really lives up to the hype — my dad used it on everything, and it actually worked. It dries clear, creates a super strong waterproof seal, and holds up great over time. Whether it was fixing leaks, sealing cracks, or quick home repairs, this stuff handled it all. Definitely a must-have for any toolbox.

Review from influenster.com
Helpful?40Z3T6QHW6C0534825972
Current price is Now $14.87
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