

🛡️ Protect your surfaces like a pro—because your concrete deserves next-level defense!
Siloxa-Tek 8500 Ultra Concentrate is a water-based silane/siloxane penetrating sealer engineered for superior water, salt, and freeze-thaw resistance. With 6x higher active ingredients than competitors, it offers long-lasting, breathable protection without altering the natural appearance or texture of concrete, brick, masonry, and pavers. DOT approved and UV stable, it’s easy to apply and covers up to 250 sq ft per gallon, making it the go-to choice for commercial and residential projects seeking durable, invisible surface defense.









| ASIN | B01MQX8QOH |
| Best Sellers Rank | #89,882 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #270 in Hardware Sealers |
| Brand | Ghostshield |
| Color | clear |
| Date First Available | July 8, 2015 |
| Global Trade Identification Number | 00855849005163 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 8.65 pounds |
| Item dimensions L x W x H | 6 x 4 x 10 inches |
| Item model number | 8500 Ultra Concentrate |
| Manufacturer | Kretetek Industries Inc. |
| Material | Silane/Siloxane |
| Number of Items | 1 |
| Product Dimensions | 6 x 4 x 10 inches |
| Style | Siloxa-Tek 8500 Ultra Concentrate |
| Surface Recommendation | Concrete, Brick, Masonry, Stone |
| UPC | 855849005163 |
| Unit Count | 128 Fluid Ounces |
| Water Resistance Level | Waterproof |
L**N
Very happy with Siloxa Tek 8500
This product is working exactly like described. Easy to put on with a garden sprayer. The water beads up on our concrete now. Very happy with this product.
C**Y
Works great, quick and easy application!
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.
R**N
Great sealer!
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.
A**R
Works great!
Very easy to use, and it works great. I sprqyed mine on with a garden sprayer and then lightly rolled over it with a large paint roller to ensure it evenly coated the surface. Do that twice and then watch the water bead off your driveway and walkway like water on a ducks back.
C**.
Fantastic product! Highly recommend!
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.
S**E
Excellent reviews for sealant and durability
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.
H**4
It works!
Water beads up on 3 month old paver patio after an easy application using a roller. Excellent customer service.
K**S
Awesome product!
I sprayed Ghostshield on the floor of my brand new shop. I thought the product was a little pricey UNTIL I USED IT! Ghostshield was SOOOO easy to use, spread just like the instructions said it would, and was too easy to clean up, since it's water based. I could not have been more pleased at the results. Liquids bead up on the floor like mercury. It did not change the appearance of my nice new floor at all. I even sprayed it on my new wooden baseboards. Did not change their appearance. I have been telling my friends about it. I LOVE IT!
Trustpilot
1 day ago
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