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Seal-Once Nano+Poly Penetrating Wood Sealer with Polyurethane - Premium Waterproof Sealant -1 Gallon & Clear

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$55.00

$ 29 .99 $29.99

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About this item

  • WATER-BASED POLYURETHANE WOOD FINISH: Our sealant provides top-notch protection against wear and tear in high traffic areas. It's odorless and ideal for use on wood siding, log homes, swing sets, outdoor furniture, wooden deck and fence, and more.
  • WOOD SEALANT: Unlike many sealers that only form a topcoat, our protector penetrates below the surface to create a long-lasting, water-resistant shield around the wood.
  • FLOOR SEALER APPLICATOR: Our premium clear is ultra-low VOC and great for enhancing the extended life of your exterior flooring. The sealant can be safely applied around your home, landscaping, vegetation, or over any water area.
  • WATERPROOF SEALER: Ditch the oil-based sealers and choose a UV-stable coating option. Our fast-drying liquid creates a flexible, breathable barrier and provides a no-fuss, easy clean-up with soap and water, as it allows the wood to grey naturally.
  • SEAL-ONCE: Our user-friendly wood sealers and stains are an effective way to protect your lumber or concrete against water damage. When you use Seal-Once, you have the satisfaction of knowing our products will not harm pets, plants, or people.



Product Description

UC Coating Line of Products
Wood Sealers
Seals and Protects for up to 10 years on vertical surfaces

First Coat

Second Coat

Apply in shade and out of direct sunlight

SEAL-ONCE outdoor stain
Ways to add color to your project with ready mix colors and add in tints.

Joe Montes
Reviewed in the United States on February 24, 2025
I used the sealer on an exterior door. I followed the manufacturer instructions for application. After two weeks with some moderate rain exposure, the sealer failed and allowed the oak door to absorb water and swell. Needless to say, the door is swollen, warped, and now ruined. I will never use or recommend this product again. Stick to varnish and real marine sealers.
Kris Schwiderski
Reviewed in the United States on February 11, 2025
Great product. Great price.
Meryl
Reviewed in the United States on January 28, 2025
This product works great to keep our original Cedar color on our fence. It goes on easy with a large brush.
spacenut
Reviewed in the United States on September 2, 2024
No issues with application and after a month or so my project is still holding up just fine outside. I used a sprayer and back brushed for the application. Only time will tell how well it holds up in the Florida weather. It looks great so far.
Luke Barrett
Reviewed in the United States on May 31, 2024
The light brown stain looks good on pine boards and highlights the grain nicely. The polyurethane portion of the product seems to make a nice smooth finish and seal well. Much easier to apply than regular polyurethane.
Darin Somma
Reviewed in the United States on March 28, 2024
This is my fourth time getting this product. The first time I got it, it came with UV protection, which is rare for clear sealants. I LOVE how easy this is to apply, it soaks in like water and just works. I used the UV protection one on my tool shed 4 years ago and till today it hasn't grayed! But then I guess they took that off the shelf, because I thought I bought the same product and sprayed it on my cedar fence the same as my shed, but it's completely grayed now.Bottom line: easy to use, feels really natural and safe to use (no smell and you get a little latex layer on your skin that's easy to scrape off), complete protection from mold and rot, but will not prevent graying anymore.Yes, put the second coat on fast if you're going to. In my experience it hasn't needed multiple coats when you apply the first thick enough.Hey Seal-Once! Bring back the UV protection formula, it really worked and the natural alternatives out there are crazy expensive!
Maryam
Reviewed in Canada on May 30, 2023
I do belive the Quality od the Paint is Good - but frankly looks much more towards orange ( look at the back.of the chest which had no prior colour)- not he Cedar - light wood colour as advertised; yea you may argue the label looks light orange but it's nit still as.light as in picture which looks more pine like; so I'll have to use another colour to paint on top of this one ...good thing I didn't use it for my deck ...
John Harper
Reviewed in the United States on November 30, 2023
I used the Nano clear in fall 2021 on my new cedar plank deck. I was satisfied with the Nano, though it did not last as long as I had hoped. In spring of 2023, I decided it needed to be resealed, completed in June. I saw bought the newly introduced Nano + Poly this time, but am less satisfied with the result this time. It may last longer, but Nano + Poly seems to have some disadvantages. First, it causes water to remain beaded up on the deck much longer after a rain. The standing water accumulates dirt/dust before it dries and when it does dry, it leaves a dirt spot. The dirt can be washed/scrubbed off, but it is a maintenance issue if you care about how it looks. Second, I spent a lot of time prepping the deck for this reseal job (brush scrubbed with cleaner, rinsed with oxalic and then sodium percarbonate solutions to neutralize the oxalic acid, light sanding, two coats of Nano + Poly, brush applied 20 minutes apart). Now there are small black spots sealed under the new coat that make the deck look dirty. I was hoping this was just due to having cleaned off some of the silver-grey patina that had developed, and that it would even out over the summer as it greyed again. Not so. Probably would have needed to thoroughly sand the entire deck to make it look as good as it did after the first coat. Next time, I will probably rent a sander, take off the Nano + Poly, and just use Nano only.
Morgan
Reviewed in the United States on April 28, 2023
I purchased this sealer for a landscaping project. Delivered quickly, well packaged and intact. I have multiple 8"x8"x12' northern yellow pine timbers that i stained with dark walnut. They are rough cut and I chose not to sand them.I allowed the stain to fully dry and preformed the entire operation in the garage out of the sun and elements.Two generous coats are important for this sealer. Also it must be above 50°, which lengthened the process due to Ohio's weather mood swings.In the pale, the product is a solid white tint and thin as water. Give her an enthusiastic shake before opening. I applied with a 3" standard brush. No other products used besides minwax stain. Must be clean fresh surface for appropriate adhesion. Sand old finishes off. Goes on white and is easy to see missed spots. Being rough cut timber, it took a little more product to fully saturate. On a smooth sanded surface a little goes quite a long way. I have a photo to show drying stages- fresh coat, about 15mins dry time, and after about 30mins.At 30mins apply your second coat, just as heavy as the first.It's easy to work with. A little messy- don't be shy with it, but it covers great.Drys totally matte, no gloss at all. Looks just like they did with only stain which is just what I wanted.I have a second photo showing our first rain with them on the ground. I waited about a day for sealer to dry before laying them down. The water beads on top which is an excellent sign. I'm hopeful to at least get a few years out of this product before needing refinished.Most important to note ... These beams are laid over gravel and sand with drainage tile underneath, however they still are on the ground, exposed to moisture and in direct sun.This is really the ultimate test for a product like this.If this sealer can survive being exposed all day everyday I don't think there is a project it cant handle.I will update in about a year with photos and hopefully a success story.
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