SEAL-ONCE MARINE Clear Wood Sealer and Waterproofing Deck Stain 1 gal for Outdoor Use
SEAL-ONCE MARINE Clear Wood Sealer, Waterproofing Deck and Wood Stain, 1 Gallon - Outdoor Use
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SEAL-ONCE

SEAL-ONCE MARINE Clear Wood Sealer, Waterproofing Deck and Wood Stain, 1 Gallon - Outdoor Use

91 ratings
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Size1 gal
Actual ColorClear

Key item features

  • Marine Protection: Special marine-grade formula deeply penetrates to stabilize and protect wood exposed to freshwater, saltwater, and high-moisture environments like docks and pool decks.
  • Eco-Friendly Formula: Ultra-low VOC, water-based, and non-toxic, making it safe for use near aquatic life, pets, and landscaping.
  • Flexible Barrier: Forms a breathable barrier that allows wood to expand and contract naturally, resisting cracking, warping, and cupping.
  • Water Repellent: Repels water within 4 hours, guarding against rain, humidity, and salt spray while maintaining the wood's natural beauty.
  • Durable Longevity: Withstands harsh marine conditions, including UV exposure and mildew, for up to 10 years of vertical and 6 years of horizontal protection.
  • Clear Finish: Dries clear to let wood age naturally or showcase its original grain; suitable for new, bare, or previously stained exterior wood.
  • Easy Application: Simple to apply by brush, roller, or sprayer with soap-and-water cleanup, available in 1-gallon and 5-gallon sizes.
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Product details

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Customer ratings & reviews

4.5 out of 5 stars
stars
91 ratings45 reviews
How item rating is calculated
  1. 5 stars80% (73)
  2. 4 stars8% (7)
  3. 3 stars3% (3)
  4. 2 stars2% (2)
  5. 1 star7% (6)

Reviews summary

Pros

  • : The sealer spreads smoothly with sprayers, brushes, or rollers.
  • : Coating improves wood appearance and protects surfaces.
  • : Resists harsh weather conditions.
  • : The formula delivers even opacity and consistent application.

Cons

  • : Shades often differ from product images or chosen options.
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Showing 1-3 of 45 reviews

Aug 31, 2026
Reviewer name: Greg
Item details
Size: 1 gal
Color: Bronze Cedar
Sold byU-C CoatingsDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Looks great

Applied easily with a 3" brush. I got 200 square feet per can on a dry (8-13% moisture) deck. Beads water immediately with one coat. hoping to get a decent life span

Incentivized Review
Helpful?396HHPSWIABP420243462
reply from uccoatings Team

Thank you for your feedback, we’re happy to hear that this product worked well for your application!

Sep 16, 2026
Reviewer name: Tammy
Item details
Size: 1 gal
Color: Clear
Sold byU-C CoatingsDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

One %26 Done- Perfect concept...

Using for my deck floor- switching from regular water sealer- Nice selection, should've thought of this sooner. One %26 done is a wonderful concept. I will share if any problems after I finish sealing my deck floor.

Helpful?396HHPSWIABP420243462
reply from uccoatings Team

Good to hear. Thanks for letting us know how it went. Contact our our technical team if you have any questions and they would be glad to assist you.

Aug 27, 2026
Reviewer name: Susanne
Top Reviewer
Item details
Size: 1 gal
Color: Clear
Sold byU-C CoatingsDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Very good stuff just makes you follow instructions. It really keeps the water going into the boards. Looks good. Everything is just perfect.

Helpful?396HHPSWIABP420243462
reply from uccoatings Team

Thank you for your feedback, we’re happy to hear that this product worked well for your application!

Current price is $66.98$66.98/gl
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4.613636363636363 out of 5 stars
4.6 stars out of 5, based on 46 seller reviews(4.6)
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