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Internet # 323542195

Model # 8500UC

1 Gallon Ultra Concentrate Invisible Penetrating Water Based Concrete and Masonry Sealer Plus Water and Salt Repellent

$229.88
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  • Prevents freeze-thaw attack and ASR
  • No formation of harmful by-products, low VOC's
  • View More Details

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Product Details

About This Product

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. Siloxa-Tek 8500 is our favorite product to treat nearly any application. A proprietary blend of silane/siloxanes, this clear penetrating sealer not only prevents deicing salt and freeze-thaw damage, but its hydrophobic nature resists moisture intrusion and vapor transmission. This is the go to choice to seal any concrete, brick, or masonry based substrate especially driveways, basements, patios and garages.

Highlights

  • Prevention from freeze-thaw attack and ASR by preventing the ingress of water, prevents further damage to reinforced concrete by limiting the substrate water content, chloride and other aggressive salts
  • Provides increased protection as a hydrophobic barrier to prevent future penetration of water and soluble aggressive agents through a crack, provides protection from spalling and pitting as a result of aggressive salts and chlorides
  • Alkali resistant, freeze-thaw/de-icing salt resistant, UV resistant, reduces vapor transmission, water beading (water repellent effect)
  • Supplied concentrated: 1 Gal. mixes with water to make 5 Gal., easy to apply, effective penetration depth, seals pores and capillaries while remaining breathable
  • Reduction of dirt pick-up, reduces risk of efflorescence, protection against micro-organism growth
  • No change in appearance of the substrate, the treated surface does not become glossy, tack free, durable finish
  • No formation of harmful by-products, low VOC's
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 323542195

Model # 8500UC

Additional Resources

Shop All Ghostshield

Specifications

Dimensions

Container Size

1 Gallon

Coverage Area (sq. ft.)

125 sq ft

Details

Application

Concrete Waterproofer/Sealer

Application Method

Brush, Pump-up Sprayer, Roller

Base Material

Water Based

Color Family

Clear

Color/Finish

Clear, Natural, Slightly Enhanced

Dry To Touch Time (hh:mm)

06:00

Finish Family

Natural

Interior/Exterior

Exterior, Interior

Maximum hydrostatic pressure (lb.)

0

Maximum Optimal Temperature (F)

90

Minimum Optimal Temperature (F)

45

Number per Package

1

Paint/Stain Features

Dries Clear, Mildew Resistant, Moisture Resistant, UV/Fade Resistant, Waterproof

Recommended Number of Coats

2

Returnable

90-Day

Substrate/Surface Material Use

Brick, Concrete, Stone

Surface Location

Basement, Basement Floor, Basement Wall, Driveway, Exterior Wall, Garage Floor, Garage Wall, Patio, Pavers

Transparency

Clear

Vertical/Horizontal

Vertical / Horizontal

Questions & Answers

After the sealant has been applied how much time can pass before it can rain
ByJul 2, 2026
1 Answer | 
Answer This Question

24hrs

By|Jul 7, 2026


    Should this product be diluted with water
    ByJun 2, 2026
    0 Answer | 
    Answer This Question

    Our subdivision has a stucco wall that faces a busy road and that gets dirty from all the traffic. Would sealing the wall with this product reduce the need for frequent power washing to clean the wall?
    ByMay 18, 2026
    0 Answer | 
    Answer This Question

    newly poured concrete porch Measurements are 23x45 (1035sq ft). After the 30day cure of the concrete we plan to apply by roller. How many gal of concentrate do we need to buy?
    ByApr 5, 2026
    0 Answer | 
    Answer This Question

    How well would this do on the concrete around my salt water pool? I have about 700 sq ft of concrete, would 1 gal of concentrate be enough for 2 coats? Also is rolling recommended?
    ByJun 1, 2025
    1 Answer | 
    Answer This Question

    Thanks for considering Ghostshield products. Yes, this product is perfect for your application and with 2 coats, applied wet-on-wet, you will need 4.6 gallons. 1 concentrated formula should be enough to treat your concrete. The recommended application method is using a low pressure pump sprayer. However, using a roller is perfectly acceptable.

    By|Jul 26, 2026

      (1)

      IS THIS PRODUCT SAFE TO PAINT INSIDE A CONCRETE SYSTERN FOR POTABLE WATER
      ByMay 1, 2025
      1 Answer | 
      Answer This Question

      Thanks for showing an interest in Ghostshield products. This product is not considered a paint, film, coating, or membrane. It is designed to repel water without changing the physical properties or visual aesthetics of natural concrete. We cannot recommend this product for the inside of a concrete potable water system without having more knowledge about the project. If you would like to speak to someone at Ghostshield, please call 855.573.8383

      By|May 2, 2025


        Viewing 1-6 of 6

        Customer Reviews

        4.9 out of 5

        • 4.9 out of 1,104 reviews
        • 99% recommend this product
        Filter by:
        Showing 1-10 of 1,104 reviews
        Works great!
        I would say it works pretty good at least after 2 months. I run out and you can see exactly where the product is.
        by
          Everything went as planed so far !! I hope it stands up to its name.
          by
          • Verified Purchase
          Product works exactly as it says but I don't care for the look of the water sitting on the top of the concrete. It doesn't absorb so it just stays on top. Especially when there is dirt too. Makes the concrete look so dirty.
          by
          Amazingly waterproof!
          Powerwashed my driveway, sidewalk and brick front porch. Knew I needed to seal it. Read recommendations for those product. It’s easy to apply with a sprayer . It will take way more product than you expect. Love watching the water bead up on the surface after a rain or sprinkler system runs! Can’t wait to see how long it lasts. Does not make it Shiney or slick . Would recommend!
          by
            • Recommended
            Great product
            Decided to tackle a 2000sq ft patio that had not been sealed in many years.Product is easy to work with. Figuring out the wet-on-wet application time was easy then worked in small areas. Most challenging part was not the product but working around the rain and heat predictions.Highly recommend.
            by
              • Recommended
              100% water repellent
              I powerwashed our driveway and the brick front patio. Read a lot about this product before purchase. Applied it in hopes of not having such a moisture issue on the surface of especially shaded areas. Love seeing the beads of water sitting on top of the surface. So far so good!
              by
                • Recommended
                Florida Residential application
                Just roller applied the Siloxa 8500 coating to my concrete driveway and sidewalk in attempt to avoid annual power washing to remove black staining.Estimated coverage was right on- Lou was very helpful on application tips. While there was a slight darkening of our concrete ( see pic of our treated sidewalk to neighbors, (who power washed at same time we did prior to applying the 8500), it’s not an issue for us if we can avoid the annual cleaning.Now we wait to see how well it protects!! 🤞
                by
                  • Recommended
                  My Application Doesn't Require a Gallon!
                  Thanks to the sample size of Siloxa-Tek 8500 first discovered two years ago, my 20+ year old concrete bird bath lives for yet another western NC summer and freezing winter - yes, it stays outside year-round. Thanks Ghostshield, appreciate you making a sample size of your product available.
                  by
                    • Recommended
                    Concrete porch step
                    Easy to apply and works exactly as advertised. I've recommended this to several friends.
                    by
                      • Recommended
                      Very Easy to Apply - Great Results
                      Second time user - six years ago applied the Ghost shield concrete strengthening and Ghost Shield 8505 driveway was starting to pit likely from salts used in winter. Lou in Customer support was outstanding as he was previously- chose to use the Ghost Shield 8500 very easy application used a premium 3/8 nap roller non shedding! Be sure to use Distilled water and follow instructions- Dried for four days then the rains arrived- the first light rain beaded nicely note first photo below/ drive was evenly covered and we should be set for hopefully 6 or more years ! Thanks !
                      by
                        • Recommended
                        Showing 1-10 of 1,104 reviews

                        Compare Key Features

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                        Product Snapshot

                        Ideal for concrete and masonry; provides superior water, salt, and UV resistance, ensuring long-lasting protection.
                        Ideal for homeowners looking for a water-based sealer, ensuring long-lasting protection for concrete and masonry.
                        Ideal for concrete, brick, and stone, this sealer offers long-lasting water repellency and UV protection, ensuring surface durability.
                        Ideal for pool decks, driveways, and pavers, this sealer offers superior water resistance, UV protection, and a high-gloss finish.

                        Coverage Area

                        125 sq ft/gal (concentrated: 625 sq ft/gal)
                        175-250 sq. ft./gal
                        875 sq ft/gallon
                        875 sq ft/gal

                        Water Resistance

                        UV Protection

                        Drying Time

                        6 hours
                        1 hr
                        2 hours
                        4 hrs

                        Slip Resistance