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

It beautifully enhanced the faded color of my old composite deck to a rich and newer look as well as provided a good seal . Applies easily.

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 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.

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.

Made my composite deck look like brand new! Holding up nicely!

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. 4-10-21 It'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.

Fantastique

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

easy to apply

This seller was very helpful and resolved our problems in 3 days. The product works great and would highly recommend the Sellers and there brand.

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.