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Question DetailsAsked on 9/29/2011

A local company in the deck re-surfacing business advertises that the product it uses (Sealwize) has a 30 year guarantee. Any info on this

product in your data base?

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2 Answers


I've re-finished several decks in the last couple of years. I've always used the highest quality products available. Cabot's, Penofin, Sikkens etc.
IF you do the proper prep and IF you use a high quality product, you're still only going to get at most, two to four years life out of the finish. The vertical (rail) surfaces will last the longest. The horizontal surfaces (deck boards, steps, rail caps) will receive the most abuse from sunlight, snow, rain etc. Those surfaces will probably need to be refinished in only two to three years.
The wood itself might not even last 30 years. The company that manufactures the product might not last for 30 years and the contractor may not last for 30 years.

Answered 9 years ago by JGHamm


Sealwize appears to operate as a franchise - I could not find the actual 30 year warranty at the company home website, or on four franchise sites I went to - but there are a LOT of comments on the web about it requiring that you have them come back and "recolor" the surface every 2-5 years, at their normal charge, so it appears this is no 30 year warranty - more like 2-5 year effectively and then they come and recoat it. Seems to be sort of like the automotive undercoating warranties you commonly see - lifetime warranty, BUT you have to get it pressure washed and recoated every 2 years (at your cost and typically higher cost than original application) to keep the warranty in effect - so effectively is only a 2 year warranty at best.

here is a Consumer Reports article/blog on Sealwize FYI -

My recommendation - stay with the known brands, and use penetrating rather than high-build products. And when you redeck, use something that will actually last based on proven experience, not the latest and greatest miracle product. Way too many people fall for the miracle product claims with only a year or few history behind them, and end up getting burned big time - exterior insulation surfaces, particle board siding, cement board siding, vinyl siding, unpainted vinyl or fiberglass window and door frames, aluminum "no-maintenance" structures for pools and ocean docks, photo-finished panelling and flooring, etc.

Here is a link to another recent similar question FYI, and you cann find more on deck finishes in the Home> Deck and Patio section of Browse Projects, at lower left -

Answered 6 years ago by LCD

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