Rated 4.63 out of 5 based on 19 customer ratings
(19 customer reviews)

16 oz Sample: $14.88 (samples are not returnable)

1 Gallon: $59.88

1 Gallon Ultra Concentrate MAKES 5 GALLONS: $219.88

The industries most innovative concrete sealer formulas just got better! 1 Gallon Ultra Concentrate makes 5 gallons of sealer, equating to 80% less packaging, 50% less transportation cost and 80% less empty container waste making the Ghostshield formulas extremely sustainable.




An industrial-grade, water-based, silane/siloxane engineered to reduce water and moisture intrusion, while protecting concrete or masonry substrates from chlorides and deicing salts.


1 Gallon Coverage: Up to 125 sq. ft. (including both coats)

1 Gallon Concentrate Coverage: Up to 625 sq. ft. (including both coats)

(1 Gallon Concentrate mixes with 4 gallons of water to make 5 gallons)

Applications: Driveways/sidewalks, patios, pool decks, garages, chimneys, roof tiles

Substrates: Concrete, concrete blocks/cinderblocks, brick, pavers, exposed aggregate, stucco, stone, slate, sandstone


  • Feature: Water & salt repellent
  • Chemistry: Silane/Siloxane
  • Color: Clear
  • Finish: Invisible
  • Category: Penetrating
  • Carrier: Water
  • Availability: Ready to Use or Ultra Concentrate: Makes 5 Gallons
  • Packaging: 1 Gallon, 1 Gallon Concentrate
  • Reconstitution Ratio: Ultra Concentrate: 1 part sealer : 4 parts water
  • Interior/Exterior: Interior/Exterior
  • Application Method: Sprayer, Roller
  • Application Temperature: 45 F – 90 F
  • Number of Coats: 2
  • Time Between Coats: 5 Minutes
  • Drying Time (dry to touch): 6 Hours
  • Drying time (full cure): 24 Hours
  • Time before/after rain: 48 Hours
  • New Concrete: Yes, at least 28 days after being poured
  • Storage/Shelf Life: 1 Year
  • Clean up: Soap/water
  • Paintable: Yes, oil or enamel based paint, first test for compatibility
  • VOC Content: 90 g/L

For complete Siloxa-Tek 8500 application, SDS Sheets, FAQ’s, testing and technical data visit

Additional information

Weight N/A

19 reviews for SILOXA-TEK 8500

  1. Rated 4 out of 5

    Jack B

    I applied this to the stone veneer frontage on my home. I applied this with a large paint brush and put on 2 coats. It was easy to apply, it looks like a white milky substance but dries on clear. Seems to be working and I hope it lasts, it’s has only been around 3 months since I applied it though.

  2. Rated 4 out of 5

    Chris K

    Used for waterproofing block, seems to work good and easy to apply. Would recommend to other people

  3. Rated 4 out of 5


    Used the Silatek and then used this product to prevent spalling on my driveway in the wintertime. Easy application process, but took a lot longer than I expected since there is a few days wait time between using each product. Applied them both a few months ago and the combination seems to be working well.

  4. Rated 5 out of 5

    Asher S

    I have a brick & mortar chimney that was leaking. When heavy rain would fall against the chimney, the water would seep through the mortar and leak into the attic. I sprayed 2 coats (the whole gallon) with a garden sprayer on the chimney portion above the roof and no more leaks. I plan to repeat this each spring.

  5. Rated 5 out of 5

    Steve Sharry

    Spent a lot of time researching this product, I needed to seal my driveway but I live in a 55 plus community and the association does not let you apply anything to your driveway that changes the color or the look. The main reason for me wanting to seal it was the leaf staining I always experience as well as excessive mold and mildew. because of this I end up getting my driveway pressure washed every 6 months and it doesn’t last. The company sent me a free sample I tried it on the side of my house, after it dried you could not tell it was there so i purchased enough for my driveway, applied two coats and I haven’t had to pressure wash my driveway in almost 2 years. Excellent excellent stuff I would recommend it to anyone, in fact both of my neighbors did theirs as well and we are all happy.

  6. Rated 4 out of 5

    George W

    This stuff is great. Very easy and fast to apply. 2 coats were necessary. The biggest unknown is it’s durability. Time will tell.

  7. Rated 3 out of 5

    Bill Dowery

    Just tried this product for the first time, I am please with the performance so far (9 moths) but it’s too early to really evaluate longevity.

  8. Rated 5 out of 5

    Luke whittle

    Product was delivered quickly. Intended use was on architectural concrete masonry block foundation having an old sculptured surface look. I used a garden pump sprayer and 4 inch brush. Blocks initially absorbed sealer very readily with a flood coat Applied the second coat after about an half an hour and blocks did not absorb as much. Performance has been tested since it was a wet season. Masonry appearance did not change. Exceptional stuff

  9. Rated 5 out of 5

    Bob Willey

    I looked at other reviews of products to seal concrete pool pavers and saw good ratings on this one. The last time I tried to have my pool pavers sealed it was a mess as the contractor tried to apply something with a roller. This time I did it myself. This stuff is great. I used a 3 gallon Echo hand sprayer and applied two even coats on the pavers after pressure washing the pavers. The product looked milky white going on, but dried clear. I would recommend this to anyone needing to seal concrete pavers.

  10. Rated 4 out of 5

    Ed S

    This is my first time using this product. It brushes on nice and soaks into the mortar. 2 coats dried fairly quickly. Used this after tuck pointing the chimney and seems to work fine. Easy clean-up.

  11. Rated 5 out of 5

    Dan S

    I ordered 20 gallons of this product and was able to apply 2 coats to a 3000 sq. ft. driveway using an airless hudson spray gun. The product went on quick, smooth, and even. After curing for 5 days I tested the product and water beaded on the entire surface as advertised, the appearance was clear and natural just what the customer wanted. My customer was very happy with the results, and so was I as their contractor. It shipped to my front door in 4 days. Can’t beat that for service.

  12. Rated 5 out of 5

    Doug Pratt

    Installed a new driveway a couple of years ago and noticed the top was starting to spall. I decided to try this product cause of the warranty and I have to say it does exactly what it claims. It stops the water from carrying the salt into the driveway and it is holding up good. I have not experienced any additional spalling, It has been about a year so time will tell but so far so good (i wished i did it sooner).

  13. Rated 5 out of 5

    Dean Goldwyn

    Have used this product in the past to seal the exterior of a chimney that comes through the ceiling into our sun room. Water was leaching out of the chimney face inside the sun room. Application has lasted, Just resealed again for extra protection, water is no longer entering the chimney face as it use too. Suggest using an airless sprayer with two coats 30 minutes apart. Pump up sprayers use too much product and don’t cover as adequately. This product does a good job and is not very expensive ($69) with free shipping.

  14. Rated 5 out of 5


    Used this on concrete pavers on porch and steps to waterproof and prevent icing damage. Have had several rains since application, and water beading up like a waxed car and sweeps off easily. Much better than previous sealer that I used which did not last longer than 60 days.

  15. Rated 5 out of 5


    was easy to apply with sprayer, use brush if any puddling, and after 2 days wet the stones and the water just beadded and rolled off

  16. Rated 5 out of 5


    Easy to apply, fast drying and extremely water resistant. Too early to evaluate long term, but seems to be working.

  17. Rated 5 out of 5


    Excellent and multi functional, used on my concrete driveway, brick wall and paver patio! The ultra concentrated option is the best deal on the market and it was easy enough to mix with water.

  18. Rated 5 out of 5


    This product was expensive, but worth the money. I ordered 5 of the ultra concentrated gallons for my 3000 sq ft driveway. I was really looking for the deicing salt protection and the water beading effect. Works as advertised and I have ordered another gallon to do the sidewalks around my home also.

  19. Rated 5 out of 5

    Michael S.

    Dear GhostShield –
    I’m building a music studio with a 4-foot high brick wainscot wrapped around the building. I read about your product online and decided to use it to prevent water intrusion and resulting freeze-thaw damage. It was applied to all of the brick, with a little spillage on the adjacent concrete slab. Your product is amazing!! I’m looking forward to 5 years of maintenance free waterproof brick!! Thank you!

Add a review

Your email address will not be published. Required fields are marked *