SEAL-ONCE MARINE Natural Wood Sealant, Waterproofing Deck and Wood Stain, 1 Gallon - Outdoor Use
SEAL-ONCE MARINE Natural Wood Sealant, Waterproofing Deck and Wood Stain, 1 Gallon - Outdoor Use
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SEAL-ONCE

SEAL-ONCE MARINE Natural Wood Sealant, Waterproofing Deck and Wood Stain, 1 Gallon - Outdoor Use

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Size:1 gal
Actual Color:Natural

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 flexible, 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 Performance: Withstands harsh marine conditions, including UV exposure and mildew, for up to 10 years of vertical and 6 years of horizontal protection.
  • Natural Finish: Dries clear to let wood age and gray 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 easy soap-and-water cleanup.
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Current price is $69.98$1.00/ea
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Sold by U-C Coatings
Fulfilled by Walmart
4.647058823529412 stars out of 5, based on 34 seller reviews(4.6)
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About this item

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Customer ratings & reviews

4.5 out of 5 stars
stars66 ratings33 reviews
How item rating is calculated
5.0
5.0
  1. 5 stars79% (52)
  2. 4 stars6% (4)
  3. 3 stars5% (3)
  4. 2 stars3% (2)
  5. 1 star8% (5)

Reviews summary

Pros

  • : Applies easily with various tools.

Cons

  • : Colors may not match expected shades or tones.
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Showing 1-3 of 33 reviews

Aug 30, 2025
Mitzi
Top Reviewer
Item details
Size: 1 gal
Color: Clear
Sold byU-C CoatingsDelivered byWalmart
5 out of 5 stars review

Verified Purchase

Worth the extra money!

I wasn't sure what to expect. Our deck is 3 years old. They used the other brand when it was built and most of the wood floor is cracking %26 splitting. First evening I pressure washed the deck. Next evening, I used my Mr clean sponge mop %26 a paint pan to apply. It Looks like thick milk or glue, so it's easy to see what you've covered. We will see if it lasts 6 years, but I'm very pleased with it today.

Incentivized Review
Helpful?396HHPSWIABP314921554
reply from uccoatings Team

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

May 22, 2026
Brian
Item details
Size: 1 gal
Color: Clear
Sold byU-C CoatingsDelivered byWalmart
5 out of 5 stars review

Verified Purchase

Seal-Once

Used this product on our boat dock . Applying is easy with sprayer and then back rolled with a 1/4” nap paint roller. Has as a great finish, good looking clear coat

Helpful?396HHPSWIABP314921554
reply from uccoatings Team

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

Apr 13, 2026
Reuben
Item details
Size: 1 gal
Color: Clear
Sold byU-C CoatingsDelivered byWalmart
5 out of 5 stars review

Verified Purchase

it arrived late and in a damaged box..paint can did not leak..those cans are tough..the damaged box wasn't human error it was most likely the weather or something that leaked when it rained 🤔

Helpful?396HHPSWIABP314921554
reply from uccoatings Team

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