DEFY Extreme Composite Deck Sealer – Crystal Clear Waterproof Sealant for Wood & Composite Surfaces with Zinc Nano-Technology, Protects Against Water & UV Damage – 1 Gallon

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.Update* I still like the product and applied it again this year. The only thing I will complain about is longevity. I have pretty heavy use on my deck. This lasted about half the season maybe a little longer.

Used this on a 10 year old composite deck and it made a world of difference. It brought the color and detail back to life. I would recommend this product and when needed wouldn’t hesitate to use again. Just recently used so not sure how long it lasts or when it would need another application.

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 can still see hazy white residue where the little puddles were previously. This residue too disappears some hours later when the deck has really dried out. Looks like something is going on, but it does eventually disappear, so not a deal breaker.Overall we are glad we used this because the decking just looks waaay better. With cooler weather the tackiness is gone; have to wait until next summer to see if it becomes an issue again. The milky residue issue also seems to be diminished, and while unsightly while things are drying out, it does eventually disappear.

Regarding the photos:Before - Tan/BrownDuring - WetAfter - 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 length planks until the puddle was gone, and dipped the saturated roller back in tray and repeated. Then, I back-rolled the wet areas to make sure everything was covered. FYI: I did cut in with a paint brush and a small microfiber roller. I noticed that the cut-in areas came out slightly darker than the rest of the deck. It doesn’t look bad though. It dries to touch from 30 min to a couple hours. To be safe, let it dry overnight before you put your furniture back on the deck. I believe the instructions say 12 hours.I finished the deck last week. It has rained for several days this week, and the sealer is doing its job. You’ll know it’s working, because the deck will have water beads and puddles on it after it rains.

works as indicated. Goes on evenly. Clear. Water resistent. Was a bit sticky for 24 hrs.

I have used this extreme version several times, as well as the regular sealer. Honestly, I don't see much difference in the endurance.I wish the composite stayed the same color as it is when the sealer is first applied. Unfortunately, any color restoration disappears when the product completely dries. It does not improve the appearance of any color fading.The Defy sealer does seal the decking, as you can see the water bead up after it cures.The most difficult part of the process is the cleaning and scrubbing. The sealer is quick and easy to apply.Buying this product is not any less expensive than buying products to maintain a wooden deck.If somebody tells you that composite decking is easier to maintain than wood, don't believe them. Composite is still a lot of work and annual maintenance.