DEFY Crystal Clear Composite Deck Waterproofing Sealer, 1 Gallon

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

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.

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.

easy to apply

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.