Siloxa-Tek 8500 Ultra Concentrate - 1 Gallon (Makes 5 GALLONS) Penetrating Concrete Sealer Water and Salt Repellent. Clear Water-Based DOT Approved Silane/Siloxane for Concrete Brick Masonry & Pavers

Summary: this is a great product, worth the effort and expense if you need to protect your concrete from chemical exposure or water absorpsion. It's easy to apply by a pump up sprayer, brush, roller, sponge, or whatever you prefer. I had some puddling of the product, from over application, and a broom worked great for redistribution. For my new, 4 month old, broom finished concrete, it took substantially less product than the general recommendation. Note that it does state 'porosity' of what your applying it to is the main factor regarding coverage rate. i.e. your mileage will vary! It's important to follow the directions and apply a second coat while the first coat is still wet. More on that below. Naturally, the second coat required less product than the first. I can barely see a difference in the look of my concrete after application... until it's wet, which causes beading and considerable resistance to absorpsion. I treated another concrete pad the following day and sprayed some of the leftover product on a small portion of the previously treated concrete (pool deck) and immediately noticed puddling and lack of absorpsion. Only time will tell how long the protection will last for my pool deck. If I get 5+ years before needing to reapply, then it's well worth it.

This stuff is legit. Water beads like glass. It doesn’t go as far as you might expect so if you aren’t sure, order extra. For my 800sf driveway I used one gallon of concentrate and one gallon of RTU, about $300 in total. Can’t speak to longevity, but it definitely works and dries invisible, maybe even a little brighter. I power washed my driveway before i applied it and used a 3/8” nap roller. The concrete soaks it up fast so it doesn’t spread very far. Second coat i applied 5-10 minutes later and it’s spreads a little better. Don’t let it puddle. If it lasts more that 5 years, I’ll be very happy.

I am very impressed with the ghostshield products! The water just beads and rolls off. I used the 4500 densifier, then put this 8500 sealer down on my driveway. I applied it using a pump sprayer. Working in small areas applying two wet coats. With no foot or heavy traffic for 36 hours.

Water beads up on 3 month old paver patio after an easy application using a roller. Excellent customer service.

Easy to apply with a tank sprayer. Coverage is as advertised. Water simply beads up on the concrete. I have used a leaf blower to move the water off my treated concrete patio.

It was purchased to seal an existing concrete driveway after power washing all the dirt and grime off it. I had originally planned to use a sprayer to apply Ghostshield 8500 but used a paint roller instead, due to it being windy on application day. I purchased the 1 gal concentrate and mixed with 4 gal of distilled water per the manufactures recommendation. The product mixed easily with the distilled water and was easy to apply using a roller (just a longer process than spraying). It has not discolored the drive nor made it slippery. It has rained a few times since I applied it and the water is definitely not penetrating. As for how long it lasts that remains to be seen as it has only been on for two weeks.

This product works!!!!! It works on concrete and stone. Period end!!! We put this on our Tennessee field stone coping around our pool. Our issue was the fieldstone will flake off if water gets under the layers. I wish I knew that before using it as coping around my pool. We used the stone on the fireplace which is on the patio as well to match. Anyways, the water just beads up like the picture shows. This is about 9 months later so I can not attest to the longevity of it but here is the deal. I got a gallon of the concentrated stuff to make 5 gallons. I mixed it in a 5 gallon bucket from Lowes. I did three coats around a 18 x 36 pool and a hot tub and I still have 4 gallons left. I used a paint roller and my wife got in the Pool and put the stuff on the edges. We used a big container lid in the Pool to catch the drippings that fell. No question it was a 2 person job for a pool. Now the down side is....we were not quite as detailed on the edges on the concrete.......well it works there too! You do notice the color difference on the concrete when it rains....it's whiter. But zero difference when it's not wet. BTW no color difference on the stone at all. However be sure not allow it to dry between coats. It will give a cloudy look to the stone dry or wet. If you want to seal stone or concrete. This is the stuff!!!!

I used this to cover/protect my new concrete slab for my outdoor patio. After letting the product dry, I noticed it left behind a lot of white stains on the concrete, more so in some spots then others. It also left behind several dark gray spots on the slab. I found within the dark gray spots, as well as in some other areas, the product did not work and or was not repelling/beading water away. However, outside of the above certain areas, the product did what it’s supposed to do and repelled/beaded water. I contacted customer service to inquire about the above issues. I was told I over applied the product which is what caused the white stains and I was informed a pressure washer could get rid of the white stains. Apparently my definition of “saturation” might be different then others as customer service indicated saturated meant, during the first coat, to apply as if it had lightly rained on the concrete. I used a roller brush to apply the product and pressure washed certain spots of the concrete. In using the pressure washer it appeared to get rid of some of the white stains, but I will be disappointed if I have to reorder more product and redo these areas. In certain spots the product works great and am very pleased. However, as of now, I’m leaving this at 3 stars because of the above issues. I’m still in contact with customer service, in which they seem to be very attentive and receptive to my questions and concerns, so my rating could increase or decrease.