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

80 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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Current price is $66.98$66.98/gl
Price when purchased online
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Arrives by Sun, Aug 23
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Sold by U-C CoatingsPro Seller
Fulfilled by Walmart
4.552631578947368 out of 5 stars
4.552631578947368 stars out of 5, based on 38 seller reviews(4.6)
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About this item

Product details

Specifications

Warranty

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Customer ratings & reviews

4.5 out of 5 stars
stars
80 ratings40 reviews
How item rating is calculated
  1. 5 stars81% (65)
  2. 4 stars5% (4)
  3. 3 stars4% (3)
  4. 2 stars3% (2)
  5. 1 star8% (6)

Reviews summary

Pros

  • : Applies easily with various tools.
  • : Provides a nice sheen to wood surfaces.
  • : Resists harsh weather conditions.

Cons

  • : Color representation may not match expectations or actual product color.
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Showing 1-3 of 40 reviews

Apr 13, 2026
Reviewer name: Reuben
Item details
Size: 1 gal
Color: Clear
Sold byU.C Coatings, LLCDelivered byWalmart
5 out of 5 stars
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?396HHPSWIABP420243462
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
Reviewer name: Brian
Item details
Size: 1 gal
Color: Clear
Sold byU.C Coatings, LLCDelivered byWalmart
5 out of 5 stars
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?396HHPSWIABP420243462
reply from uccoatings Team

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

Aug 20, 2020
Reviewer name: Earl
Item details
Size: 1 gal
Color: Clear
Sold byU.C Coatings, LLC
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

So far so good!

So far so good. It's only been a few weeks since I purchased this product so keep that in mind. It applies very easy, I'm using it on my new cedar deck. It's rained a little and I have noticed that the water on the cedar is beading up. I'll apply a second coat later this year.

Helpful?396HHPSWIABP420243462
reply from uccoatings Team

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