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Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, White, Cartridge

19.19

Flex Paste, Waterproof Paintable Putty, Spackle Sealant, Fill Gaps Cracks Holes - Block Out Water and Air - UV Resistant - Walls, Drywall, EPDM, Concrete, Roof, RV Repairs, White, Cartridge

4

50+ bought in past month

Highest ranking 101

13 comments

$19.19

· NEW! STAY FRESH CONTAINER – Blocks out air and locks in freshness to extend the sealing power of Flex Paste, with no waste · COAT, SEAL & PROTECT - Penetrates deep to seal out air, water, and moisture. Once dry, it turns into a strong, flexible, watertight, rubberized barrier · WORKS UNDERWATER - Can be applied underwater, and it even dries underwater · FILLS LARGE AREAS - Super thick rubber paste clings to the surface and instantly fills large gaps, cracks, and holes · FULLY PAINTABLE - Once fully cured, it can be painted any color. Helps prevent rust and corrosion, and it is UV resistant

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Reviews From
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ZWReviewed in the United States on May 8, 2025

Great stuff, very easy to apply like a butter, in a couple of minutes job done. I used it over multiple areas inside the attic to stop roof leaks after recent heavy rain. I saved hundreds of dollars and wasting time with roofing companies.

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Nicole SaulloReviewed in the United States on May 8, 2025

This stuff is very stiff. At first I thought the can leaked and it dried out. It didn't, it's supposed to be that way! Apply with a putty knife. Doesn't run at all. Dries perfectly. I love it!

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Carroll SReviewed in the United States on October 28, 2024

UPDATE - I have been monitoring the pipe for the last few days. While I initially thought the paste was going to provide the fix I needed, that "thought" would be incorrect. The water started leaking again. Be smart/save your money and do not buy this stuff. I'm going back to what I should have done to start with - turn off the water and replace the pipe. This Flex Paste is JUNK!!!! Had a very small leak at the base of this water faucet (small droplets of water on the PVC surface). Based on the advertisement I thought the paste would be the perfect fix. I followed the directions as stated on the container. After apply a good initial coat, I still had the small leak. The next day, I applied another coat - still had the leak. The next day, after turning off the water to everything, I applied another coat heavy/massive amount of paste using both a putty knife and my hand. Left the water off for 1 to 2 hours and the leak appears to have stopped (after using most of the paste). What a pain!!! While using the paste, I was diligent in keeping the lid on the paste. At the end of each day, I would use a rubber mallet to hammer the lid on. Regardless of the tight seal, the paste still hardened. Probably would have been easier to just replace the bad piece of PVC that was leaking.

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S. Margaret M. KennedyReviewed in the United States on May 12, 2025

Calking is fine. I wish I got the tube with the calking gun included. It is much easier to apply!

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West TexanReviewed in the United States on May 21, 2025

Stuff worked grwar

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Jim MReviewed in the United States on December 20, 2024

I applied this to a sanded/cleaned fiberglass crack. Let sit for 2-3 days then refilled with water. After about 4 months it began to break down.

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Concerned CustomerReviewed in the United States on May 14, 2025

Works as the commercials promise keep on hand in every household !!

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M1Reviewed in the United States on May 11, 2025

Laughed at Phil swift commercials…. Stopped laughing when it worked

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Nikki89Reviewed in Canada on March 22, 2025

My cars roof has some pretty bad rust, finally it started to leak. So before winter came I decided to seal it up with this. To my surprise it works really well lol… not the best thing to use on your roof, but it’s the quick and easy repair for an older car. Not the way I wanted to repair it, but it does the trick for now!

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関 明雄Reviewed in Japan on May 14, 2025

トップライトの雨漏りに、ガラス周りをこのペーストでシーリングしました。効果は高いけど購入の半分は固まりで使えない

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Teresa GalenaReviewed in Canada on March 5, 2024

Easy to use works great

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Greg RitchieReviewed in Canada on April 16, 2025

Best product for my inside mud guard repairs. Stronger than black ext caulking that ai used last time.

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Don ChapmanReviewed in Canada on September 13, 2024

It came to me dry and had to thin it out .