Flex Seal Max 17oz, Black Sealants
Flex Seal Max 17oz, Black Sealants
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Flex Seal Max 17oz, Black Sealants

4.6 stars out of 902 reviews
(4.6)|
902 ratings

Key item features

  • Easy to use, portable, liquid rubber spray
  • Dries to a watertight, flexible, rubberized coating
  • Coats, seals, protects and stop leaks fast
  • Stays flexible and seals out water for years, and can be painted any color
  • Works on wood, metal, concrete, glass, plastic, and so much more
Current price is $16.87
Price when purchased online
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One-time purchase $16.87

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Columbus, 43215
Arrives by Today
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Order within 5 hr 44 min
Sold and shipped by Walmart.com
Free 90-day returns
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About this item

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Customer ratings & reviews

4.6 out of 5 stars
stars902 ratings701 reviews
How item rating is calculated

Reviews summary

Pros
  • : Process is straightforward and fast.
  • : Provides even, watertight surface coating.
  • : Forms a waterproof barrier to prevent water entry.
  • : Forms seal in cracks and holes.
  • : Forms a watertight seal to stop leaks quickly.
Neutral
  • : Can be straightforward for simple issues, but complex problems may be challenging.
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Showing 1-3 of 701 reviews

Nov 12, 2025
Denise
Top Reviewer
Item details
Color: Clear
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Worked Great !

This sealing product worked great on our gutters. After they were installed we had two leaks, so I thought this might work, it works in their commercials. It did ! It was terrific, and easy to use. I wiped the areas, shake the can, spray the area that leaked, and spots were seams. I spayed evenly as it made a wide surface spray. No more leaks !

Helpful?5GN5P7B28805282603070
Jan 31, 2025
WalmartCustomer
Item details
Color: Black
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

I havent had the product long enough to really see any negatives, so far its doing what its supposed to. Had to rate quality yet, but it came in a generous size. Price was competative with other sellers, and i didnt have to buy two cans at once. Only complaint was the delivery fee which raised the price by another 3rd.

Incentivized Review
Helpful?5GN5P7B28805282603070
Jul 4, 2025
Robert
Top Reviewer
Walmart Associate
Item details
Color: White
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Buying again

I first bought this in black and had excellent results. I'm using this for vinyl window casings outside that have cracked and to "patch over" previous screw holes in my vinyl siding. It blends in nicely and seals up great.

Helpful?5GN5P7B28805282603070