DEFYExtreme 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.

I did a fair amount of research and this DEFY stuff kept coming up as the best so I decide to try it. Lots of prep time so I wanted to put down the best.This is a 20 year old original and never sealed Gray Treks Deck. It is 12' x 30' or 360 sq. ft.The stated coverage per container of 300 sq. ft. was the minimum so I bought 2 thinking it was more than enough. I was a little concerned as I started because the deck was taking quite a bit but I had enough to do 2 coats.Pictures are as follows: 1st was deck prepared, 2nd shows there was a distinction after applying & drying, 3rd was the pad & tray I used to apply, 4th is showing a little more than 1/2 of the 2nd. jug left after 1st coat and last picture is deck after 2nd coat. I have a small amount left. There were no overlap marks.I did have to do in-between the boards with a brush which was time consuming and tiring but necessary. The rest was done with the pad and was easy. The second coat obviously much easier and the coating went a much longer way.So my planks were fairly rough or porous which is why I did a second coat and I'm pleased with how it looks.I'm giving 5 stars for ease of application and looks and will return to review its durability at a later date.4-10-21It's Spring 2021. Our deck is on the North side of our house and after the fall & winter there is always significant mold & mildew especially nearest the house. This year there is none so this product works. I think prep is very important so I was diligent about this because I wanted to give it the best chance to work. It's said it will last a couple years so we'll see how it looks in Spring 2022. Right now I'm thrilled I don't have to power wash it.

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.

Brought my composite deck back to life. I used a power washer to clean my deck and had streaks and dull spots afterwards. I wasn't aware there was such a product like Defy for composite decks...so glad I found it on Amazon! Very easy to apply to a clean deck...let fully dry for 24 hours and your deck will look brand new. Beautiful non-slip shine. I have a fairly large deck, approx. 26 x 20 and used less than half of the product. Well worth it. Highly recommend. Too soon to rate longevity or durability, but it's been great so far.