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Flex Seal
Flex Seal Sealant, 2 lb, White

Flex Seal Sealant, 2 lb, White

4.3· 1,900 ratings

Last price we saw

$51.19at ReStockIt, last seen Nov 5

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Our take on the Flex Seal Sealant, 2 lb, White

Flex Seal is a rubberized liquid coating in a 2 lb can that brushes or rolls on and dries into a flexible, waterproof white layer. It is used on roofs, gutters, foundations, pools and other surfaces where a thick rubber membrane is wanted. The best new price is $31.99 at eBay as of November 4, 2026, and only one store lists it new, so there is no meaningful recent price range to compare against.

Best forRoof and gutter leak patchingSealing foundations and concrete cracksWaterproofing around pools and pondsDIYers who want a brush-on rubber coating
Pros
  • Dries to a flexible rubber layer that moves with the surface
  • Waterproof and usable indoors or outdoors
  • White finish suits roofs and light surfaces
  • Brushes, rolls or sprays on without special tools
  • Covers a range of materials, from metal to masonry
Cons
  • 2 lb can covers only a small area, so large jobs need several cans
  • Rubber smell is strong while wet
  • Needs multiple coats and full cure time before water exposure
  • White shows dirt on roofs and outdoor surfaces
  • One new listing at $31.99 limits price comparison

Flex Seal Sealant, 2 lb, White prices at every store

  • eBayCheck price at eBay
  • ReStockItCheck price at ReStockIt

Flex Seal Sealant, 2 lb, White price history

Lowest price we've seen: $51.19 on Nov 5 at ReStockIt. Tracked across 1 store since Nov 5.

What reviewers say

With 4.3 out of 5 from about 1,900 ratings, most owners report it seals leaks and stays flexible. Complaints center on coverage per can and the strong odor during application.

Pros
  • Seals leaks and cracks well
  • Stays flexible after curing
  • Holds up outdoors through weather
Cons
  • Cans cover less area than expected
  • Strong rubber smell while drying
  • Needs several coats for a solid seal

Specifications

Type
Surface Coating
Formula
Rubber
Color
White

Questions and answers

Is Flex Seal worth it for a roof leak?
For small leaks and seams, yes. It goes on thick and cures flexible. For a large roof area, the 2 lb can runs out fast and a roofing membrane may cost less per square foot.
How much area does a 2 lb can cover?
Expect roughly 2 to 4 square feet per coat at a normal thickness, less on rough surfaces. Plan on two or three coats, so a small can handles only a patch.
How long does it take to dry?
It skins over in about 30 minutes to a few hours and needs 24 to 48 hours to fully cure. Do not expose it to water or rain until it is fully cured.
Can I use it on a pool or pond?
Yes, once fully cured it forms a waterproof rubber layer. Let it cure completely and check that the surface is clean and dry before applying.
When is the price lowest?
Only one store lists it new at $31.99 as of November 4, 2026, so there is little price competition. Check the price history before buying and compare with multipacks, which often cost less per pound.
What do buyers say about the Flex Seal Sealant, 2 lb, White?
Rated 4.3 out of 5 from 1,900 ratings.
Where can I buy the Flex Seal Sealant, 2 lb, White?
2 stores we checked sell it, including eBay, ReStockIt.

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