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4.4 out of 5 stars. 69 reviews
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Seal-Once 1 gal. Clear Water-Based Waterproofing Exterior Sealer, Eco-Friendly Barrier, Low VOC

4.4

(69 Reviews)

|

Item # 2494331

$41.39

Sale

$45.99

Save$460(10%)

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A woman outside with a dog

Seal-Once 1 gal. Clear Water-Based Waterproofing Exterior Sealer, Eco-Friendly Barrier, Low VOC

  • Limited Time Deal

Seal-Once 1 gal. Clear Water-Based Waterproofing Exterior Sealer, Eco-Friendly Barrier, Low VOC

Item # 2494331

Seal-Once Seal-Once 1 gal. Clear Water-Based Waterproofing Exterior Sealer, Eco-Friendly Barrier, Low VOC
Seal-Once Seal-Once 1 gal. Clear Water-Based Waterproofing Exterior Sealer, Eco-Friendly Barrier, Low VOC

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$41.39

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$45.99

Save$460(10%)


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The Seal-Once 1 gal. Clear Water-Based Waterproofing Exterior Sealer provides protection and stability for wood that finishes and performs, as well as an oil base, and withstands harsh environments near open water. Water based, eco-friendly and ultra-low VOC ensures the product is safer for people, pets and plants and is non-hazardous to aquatic life. Formulated to penetrate below the surface, creating a flexible and breathable barrier that expands and contracts with the elements, resists abrasion, plus protects against UV fading and water damage. For use on docks, decks, fences and siding. Use this waterproofing sealer to seal and protect up to 10 years on vertical surfaces and 6 years on horizontal surfaces.

  • Penetrates below the surface
  • Water-based, eco-friendly and ultra-low VOC waterproofing sealer
  • Resists abrasion for durability
  • Repeals moisture within 4 hours
  • Creates a flexible and breathable barrier
  • Protects against UV fading and water damage
  • Withstands harsh environments near open water
  • Non-hazardous to aquatic life
  • Seals and protects up to 10 years on vertical surfaces and 6 years on horizontal surfaces
  • Covers up to 90 sq ft.

Q&As

1 - 10 of 25 Questions

Q: Is this the marine grade? Item # 2494331

22 days ago
1 Answer
  • A: Yes, Item # 2494331 is Seal-Once Marine Grade. What is your project so I may send you information on preparation, application, and expectations? Contact us directly for more detailed info.
    20 days ago
    Helpful?

Q: Methods of application

30 days ago
1 Answer
  • A: You did not if it was a deck, dock, siding, or fence. We will assume it is for a deck: you can apply the required 2 coats of Seal-Once water proofer with a brush. Apply 2 thin coats. If you spray or roll, you must immediately brush the area using a brush. It is called back brushing. Do not spray or roll and leave it, you must back brush it immediately after spraying or rolling, using a brush. Brushing is very important. You begin at the end of two boards. You will brush to the other end of the same two boards. Now apply a second coat to the same 2 boards. Apply the second coat within 5-10 minutes of the first coat. The second coat must be applied while the first coat is still wet. (Wet on wet application). Push the product into the wood with the brush. Spread it out evenly and not too heavy. More is not always better. Do not allow it to puddle. Wipe off any excess with a rag. This way, you never walk over wet product.
    27 days ago
    Helpful?

Q: Would it be safe for chicken coop exterior? To seal outside of the coop?

a month ago
2 Answers
  • A: We do not recommend any Seal-Once products for animal cages or animal enclosures, including the outside surface of the coop.
    a month ago
    Helpful?

Q: Is the finish glossy?

a month ago
1 Answer
  • A: It's a semi-gloss finish.
    a month ago
    Helpful?

Q: Is it a satin or shiny finish

2 months ago
1 Answer
  • A: Hi Prayer shed! This has a flat/satin-like finish.
    2 months ago
    Helpful?

Q: can it be used over Trex

2 months ago
1 Answer
  • A: Hi Dave- No. You cannot apply another stain, sealer, or paint over a previously applied layer of SEAL-ONCE Clear Exterior Sealer.
    2 months ago
    Helpful?

Q: 7+12 utility trailer wood deck how many gallons to do

2 months ago
1 Answer
  • A: Hi Dawg69! Coverage Area is 350 SQ FT so you will need roughly 2 gallons of Seal-Once sealer.
    2 months ago
    Helpful?

Q: Can I use this on plywood sub top for an exterior stone counter?

4 months ago
1 Answer
  • A: Plywood is notorious for absorbing moisture. Seal-Once will slow it down but not stop it. New pressure treated wood will need to weather 3 months in warm weather before you clean and apply Seal-Once. (Moisture content must be under 20%) FYI: Seal-Once is not appropriate and not tough enough for use on a boat, shop floors, trailer floors, sub floors, sub countertops, or roofing construction. You cannot apply stain, sealers, primer, paint, glue, epoxy, polyurethane, or varnish over Seal-Once. They will bead up and roll off. Also, you cannot apply Seal-Once products over stain, sealers, primer, paint, glue, epoxy, polyurethane, or varnish. Seal-Once will not penetrate leaving un-even shiny/sticky spots. We do not make any products for your project. You need an industrial sealer. We do not make that type of product.
    4 months ago
    Helpful?

Q: Can it be applied over stain and sanded spar varnish that has been stripped

4 months ago
1 Answer
  • A: Do not apply Seal-Once over stain or varnish. There may be old product hidden deep in the wood pores and Seal-Once will not penetrate leaving un-even shiny sticky spots. You cannot apply Seal-Once products over stain, sealers, primer, paint, polyurethane, or varnish. Seal-Once will not penetrate leaving un-even shiny/sticky spots. Also, you cannot apply stain, sealers, primer, paint, polyurethane, or varnish over Seal-Once. They will bead up and roll off.
    4 months ago
    Helpful?

Q: What is the best way to apply this product to the wood?

4 months ago
1 Answer
  • AI-assisted, Human-approved
    A: Hi Neighbor- The best way to apply this sealer is using a brush to push the product into the wood. If you spray or roll it on, you must immediately back-brush the area. Apply two thin coats "wet on wet," meaning the second coat should be applied within 20 minutes while the first is still wet.
    4 months ago
    Helpful?
1 - 10 of 25 Questions

Reviews

Rating Snapshot

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52 reviews with 5 stars.
8 reviews with 4 stars.
1 review with 3 stars.
3 reviews with 2 stars.
5 reviews with 1 star.

Overall Rating

4.4
10 out of 15 (67%) reviewers recommend this product

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1 to 4 of 69 Reviews .
1 – 4 of 69 Reviews
Chehalis Washington
Review 1

Tractor Supply failed

5 days ago
Never received the product. Shipping failed.

No, I do not recommend this product.

Response from uccoatings Team:
3 days ago
uccoatings Team
We're sorry to hear that there was an issue with your shipping. If you would provide your order number, we would be happy to look into this for you. uccoatings
Review 1

Beautiful results

10 days ago
Marine grade is perfect for outdoor furniture that will be in the weather. Excellent coverage and consistent coverage makes for beautiful results.

Originally posted on UC Coatings

Topeka, Ks
Review 1
Age65 or over
GenderFemale

No change to wood color

15 days ago
I used house wash and pressure washer to clean cedar. Let it dry a few days and then applied product with foam pad to soffit and with pump sprayer to siding, brushing to ensure complete even coverage and also second coating while still wet per instructions. Going to try roller on soffit to see if it drips any less. Soaks in well and dries pretty quickly. Not bad to work with but kinda difficult to get off skin, which is a good sign of its longevity. As a liquid it is like milk. When it dries you don't see it, at all. I would stress that it seems like it does not change the color of the wood hardly at all. Comparing to Cabot Australian Clear which I put on back of house which does darken and add golden color, however, it only lasts a couple years. Hoping this product lasts as long as it says 6-10 years.

Originally posted on UC Coatings

North Carolina
Review 1

Sealer works great

22 days ago
Seal-Once Marine grade Sealer

Yes, I recommend this product.

Response from uccoatings Team:
19 days ago
uccoatings Team
Thank you for your feedback, we
happy to hear that this product worked well for your application! uccoatings