DEFY Crystal Clear Composite Deck Waterproofing Sealer – Keep Your Deck Safe from Moisture and the Elements

Amazon CustomerAmazon Customer: Regarding the photos:
Before - Tan/Brown
During - Wet
After - Slightly Cedar/Red (The original color)

I had to rebuild and replace portions of my 15 year-old deck. I also installed new posts, sleeves, railings, and facia. Anyway, the composite decking is still in great shape, but it was faded. I was going to use a tinted sealer, but the reviews were inconsistent. I used this Defy sealer three years ago, and I was satisfied with its performance. I knew what to expect.

My deck is approximately 300 square feet including the steps. After thoroughly pressure washing the decking, I used 1.5 gallons of Defy to do one coat. Doing a second coat may be a waste of time, because in my experience, the product repels itself when it fully dries. Lay it on generously while it’s wet. You’ll know if it’s enough.

I used a long handle and a 9”, 3/8” nap roller cover.

You don’t really paint it on, you push on. That’s why by it’s so easy to do. Dip the roller in the tray like you do when you paint. Make a puddle of sealer and push it onto the decking (a 9” roller spans across the width of 1.5 planks on my deck). I pushed the sealer the of the...

United States on Oct 17, 2023

Amazon Customer: An old & somewhat degrading Trex composite deck was first cleaned with the DEFY deck cleaner. After drying to touch, the DEFY composite deck sealer was sprayed with a light coat onto the deck with a high efficiency airless sprayer. The application to about 850 sq. ft. of deck took about 30 minutes, with a second coat applied about a half hour later (deck was dry to the touch before the second application). The deck was left to dry until the next day. At the time of this rating, the effectiveness of the sealant is unknown. However, the deck looked like new with what looked like a “plastic-like” sheen on the boards.

The DEFY Composite Deck Sealer, was the only product we could find for the condition of our deck. Our deck product was among the first composite materials available at the time of installation, & had started to decompose over 20 years. Given how well the deck looked after applying the sealer, we are very optimistic that the product will protect the deck material for years to come. The cost of sealing the deck pales in comparison to replacing the boards.

Canada on Aug 18, 2023

Ken R.: Great product does what it claims however the coverage stated on the information provided is a tad generous so knock off 25% when calculating overall area for your composite deck the product it’s a must

United Kingdom on Aug 17, 2023

Kindle CustomerKindle Customer: I was a little skeptical before purchasing this product. My deck was looking really bad from wear and tear and fading from the Sun. After using this, I could not be more impressed with the outcome. Look at the two before photos and the three after. You can not get these photos confused, look at the differences. What a great product. I'll continue to use this for sure.

United States on Jun 14, 2023

Keith: My Trex deck is only about a year and a half old but it gets used hard. This spring when cleaning it I had a hard time getting it clean. I tried scrubbing, outdoor cleaners, and pressure washing it. All three methods looked good while wet but then dried to still looking dirty and worn. Then I found this product. My deck looks better than new. It brought back the nice dark color and covered what I thought was dirt and grime. The best part is it helps prevent new messes dirty paw prints and shoe marks hardly show up and are easy to clean if they do. Right now I am unsure about the durability and longevity of the sealer but even if I have to do it once a year it was so easy to apply I will be happy to.

United States on May 05, 2023

Diplomat: Applied this product per package instructions on 20+ year old composite decking which had badly faded with age. Went on easily (deck was pressure washed before hand, and dried out for more than a week), and covered a lot of area. It truly renewed the look; went from faded, flat, and washed out to something with some shine and renewed deeper colors. The "grain" of the product also looks much better. Overall I was impressed at this point.

However two issues arose later which lowered the overall rating. First, in continued direct sunlight, even in moderate temperatures (Pacific Northwest), the deck feels slight tacky/sticky. It appears to be completely temperature related since it does not occur in cooler weather. Perhaps I was too liberal in applying it? Not a deal breaker, and after a couple of months I think the tackiness is somewhat reduced. We'll see how it is next summer.

Second strange result: before application, water on the deck just disappeared, probably absorbed by the decking or something. Now it beads up (a good thing, I think?) and sort of puddles. BUT, as the little puddles sit, the liquid becomes sort of milky. When the water is nearly all evaporated you...

United States on Oct 11, 2021

Ram Das: easy to apply

Australia on Jul 24, 2021

Shannon: After looking for a proper sealer for my composite deck I found this brand in my seach of the internet. Watched some youtube videos about it and gave it a try. Got the first coat on and it went one easily. Not hard at all to use and easy to clean up after. So excited to find it! So far it has dried totally clear. Second coat tomorrow.

Canada on Jul 06, 2021

Amazon Customer: Did not cover even small grease stains in composite decking. It did however rejuvenate the sun bleached decking that is less travelled. Would be a.far better product if a stain was available .

Canada on Aug 28, 2020

SkywalkerSkywalker: Bought a 5-6 year old house about a year ago and noticed that the composite deck had become faded and water would "soak in." We love the material (no splinters) and the strength, but the look was a bit dated. Tried pressure washing and it got cleaner, but not an improved look. After some research, found this product, which had good reviews. I purchased 3 gallons for a deck that is about 1200 square feet (this was what was recommended by the manufacturer). Applied it with standard painting rollers and brushes, but only used about 1.75 gallons. I really couldn't apply it any thicker. Application was interrupted by dark clouds and then rain - but gave a great view of how well it works. Look at the water beading up. Only issue now is that the deck doesn't dry off after rain quickly, but a squeegee takes care of the majority of it. Overall, a great product, brought the sheen back to my deck and protects it from the sun and rain.

United States on Jun 30, 2019