Thompson's WaterSeal Multi-Surface Waterproofer, Clear, 1 Gallon
Thompson's WaterSeal Multi-Surface Waterproofer, Clear, 1 Gallon
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Thompson's WaterSeal Multi-Surface Waterproofer, Clear, 1 Gallon

4.2 stars out of 688 reviews
(4.2)|
688 ratings

Key item features

  • Prevents Water Damage
  • Allows Wood to Gray Naturally
  • Use as a wood sealer, brick sealer, or for concrete waterproofing
  • Lab tested to meet ASTM-D4446 for waterproofing wood
  • Clear waterproofer provides waterbeading protection for multiple surfaces
Current price is $17.97$17.97/gl
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About this item

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Customer ratings & reviews

4.2 out of 5 stars
stars688 ratings313 reviews
How item rating is calculated
  1. 5 stars70% (479)
  2. 4 stars11% (79)
  3. 3 stars5% (32)
  4. 2 stars2% (13)
  5. 1 star12% (85)

Reviews summary

Pros
  • : Application is straightforward with various tools.
  • : Offers competitive pricing compared to similar products.
  • : Has a protective coating for wooden decks.
  • : Protects wood from water damage and elements.
  • : Provides visible waterproofing against rain and snow.
Neutral
  • : Can be glossy and protective, but may appear blotchy or uneven.
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Showing 1-3 of 313 reviews

Oct 15, 2025
Ray
5 out of 5 stars review

Verified Purchase

Nothing Lasts Forever

Using untreated wood outdoors will deteriorate quickly unless it's protected. Thompson is my preferred water sealing sealing product. It won't keep the wood safe forever but it does extend its life. My little garden windmill was sealed with Thompson and stayed good looking for 5 or 6 years before i had to cover the good looking wood with paint. My new greenhouse has a particle board floor raised 6 to 10 inches off the ground but to be safe I sealed both sides of the sheathing with Thompson.

Helpful?4KQ6J7P0KZVE17300259
Jul 11, 2025
anonymous
5 out of 5 stars review

Verified Purchase

Having relied on this brand for years, I still like to use it on my outdoor stone masonry. The multipurpose use is not limited to my stones; anything outdoors gets a good treatment with the waterproof for longevity, while keeping maintenance easy. I would highly recommend this product.

Helpful?4KQ6J7P0KZVE17300259
Jan 4, 2026
ANGIE
Top Reviewer
5 out of 5 stars review

Verified Purchase

Great for outside deck

Easy to apply by brush. We coated our outside deck and it repelled water nicely. Doesn't smell badly going on. Be sure to let it dry completely before touching or walking on it. Also do on a nice day, no wind, as leaves and dust will stick to it.

Helpful?4KQ6J7P0KZVE17300259