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Internet # 205212675

Model # 8500

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1 gal. Invisible Penetrating Water Based Concrete and Masonry Sealer Plus Water and Salt Repellent

$69.88
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  • Industrial-grade sealer reduces water and moisture intrusion
  • Protects concrete or masonry substrates from aggressive salts
  • Seals concrete, brick, driveways, basements and more
  • View More Details

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Product Details

About This Product

GHOSTSHIELD SILOXA-TEK 8500 READY TO USE: Versatile, invisible, enduring-the criterion of penetrating concrete sealer. WITHSTANDS THE HARSHEST ELEMENTS: Prevent deicing salt, chloride and freeze-thaw damage with our most recommended sealer. Hydrophobic concrete resists rain, moisture, mold and mildew - preventing cracking. Our proprietary silane/siloxane blend offers longer service life and better performance in a safe water-based formula. PREVENT CRACKING, PITTING & SPALLING: Easily applied with a low-pressure sprayer, roller, or brush on a variety of concrete, brick and masonry applications. Use indoors and outdoors on new and old concrete. Approved by the Department of Transportation for use on highways and bridges, approved by our customers for use on driveways, patios and basements. DRIES INVISIBLE: Imbue your concrete with the power of water and salt repellency while preserving its original appearance. Available ready to use or concentrated (5x). Use stand-alone or as a top-coat with a densifiying primer, such as the Lithi-Tek 4500, for increased performance and abrasion resistance. *Not recommended for colored concrete.

Highlights

  • Excellent waterproofing - Penetrates deep within the concrete chemically reacting within the pores and capillaries creating a long-lasting hydrophobic surface that beads water
  • 100% breathable - Non-film forming. Allows moisture within the concrete to escape without adverse effects to the sealer. Does not trap moisture
  • Protects against chloride ion penetration - Forms an effective chloride screen dramatically reducing chloride ion ingress preventing deicing salt / chloride damage
  • Reduces moisture intrusion - Resists wind-driven rain, prevents freeze-thaw damage, spalling, pitting and cracking.
  • Resists organic growth - Resists mold, mildew, lichen, and efflorescence
  • Department of Transportation approved - Meets and exceeds DOT specifications
  • Improves durability - Prevents capillary uptake of water and the aggressive substances dissolved in it
  • Resists freeze thaw and thermal cycling damage
  • Natural flat finish - Does not change surface appearance, UV stable will not breakdown with light exposure
  • Can be applied to cured, honed and polished concrete - Ideal for horizontal surfaces exposed to pedestrian and vehicle traffic, compatible with silicate densifiers
  • Water based - Low VOC's, environmentally friendly
  • Online price includes PaintCare fee in the following states: CA, CO, CT, DC, ME, MN, OR, RI, VT, WA
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Product Information

Internet # 205212675

Model # 8500

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, Low Odor, Mildew Resistant, Moisture Resistant, Mold Resistant, Sealer, UV/Fade Resistant, Waterproof

Recommended Number of Coats

2

Returnable

90-Day

Substrate/Surface Material Use

Brick, Concrete, Stone, Stucco

Surface Location

Basement, Basement Floor, Basement Wall, Driveway, Exterior Wall, Foundation, Garage Floor, Garage Wall, Patio, Pavers, Pool Deck

Transparency

Clear

Vertical/Horizontal

Vertical / Horizontal

Questions & Answers

Can this be used on interior concrete floors?
ByOct 26, 2026
1 Answer | 
Answer This Question

Yes the Ghostshield 8500 can be used indoors

By|Oct 29, 2026


    Does this cover 125sq ft in 2 coats or 1?
    ByOct 26, 2026
    1 Answer | 
    Answer This Question

    Thanks for showing an interest in Ghostshield products. The 125 sq. ft. coverage includes (2) coats. If applying a single coat, a gallon would cover 250 sq. ft.

    By|Oct 26, 2026


      Can this product be used on concrete blocks of a cross space?
      ByOct 22, 2026
      0 Answer | 
      Answer This Question

      Does it make the surface slick?
      ByOct 22, 2026
      0 Answer | 
      Answer This Question

      So it is applied as two coats wet on wet. Since it is a 20x24 garage floor i am doing, it would be impossible to not walk on it before the first coat dries. How do I handle putting on the second coat?
      ByOct 21, 2026
      1 Answer | 
      Answer This Question

      Thank you for your interest in Ghostshield products! Siloxa-Tek is an invisible, penetrating concrete sealer that does not form a film or coating on the surface. You can walk on treated concrete while the sealer is still wet without affecting its performance. However, we recommend avoiding walking on any untreated concrete while the sealer is wet. Residue transferred from your footwear may leave no immediate visible marks, but footprints can become visible later when the untreated concrete gets wet.

      By|Oct 27, 2026

        (1)

        I have a new concrete shower pan that has a solid concrete stain on top. Is this the appropriate penetrating sealer for that application?
        ByOct 20, 2026
        1 Answer | 
        Answer This Question

        Thanks for showing an interest in Ghostshield products. Siloxa-Tek 8500 must come into direct contact with the concrete material to catalyze or "react" in order to provide repellency properties. The solid stain (depending on the type) may prevent this. If the stain is a coating or forms a film on the surface, Siloxa-Tek 8500 would not be appropriate.

        By|Oct 26, 2026


          will this be effective on a bathroom floor after mold remediation?
          ByOct 18, 2026
          0 Answer | 
          Answer This Question

          Can it be used on a kitchen countertop
          ByOct 7, 2026
          1 Answer | 
          Answer This Question

          We would recommend either Ghostshield Countertop 660, 770, or 880. These products are also sold here on HomeDepot.com. 660 is a low gloss finish. 770 is a water-based invisible finish. 880 is a solvent-based invisible finish.

          By|Oct 12, 2026


            Viewing 1-8 of 278

            Customer Reviews

            4.8 out of 5

            • 4.8 out of 1,332 reviews
            • 99% recommend this product
            Filter by:
            Showing 1-10 of 1,332 reviews
            Product is easy to use, I simply applied it using a pump sprayer. In preparation, I used a 10" weighted concrete grinder to smooth off my deteriorated old 12'x14' concrete patio. Next, I applied the two "wet coats "of Ghostshield 8500 using the pump sprayer and rolled it out using a 7" paint roller. The application only took 20 minutes in total, using up the 1 gallon of material. Very easy and totally workable. It rained a few days later and the water beads up on the treated surface. Definitely recommend.
            by
            Applied with a sprayer onto a new concrete garage floor after it had cured for 4 weeks. Was easy to apply and we ended up using 2 gallons to apply two coats onto 440 square feet. Provides a nice protective layer without changing the look of the concrete. So far it has repelled water extremely well.
            by
            Used the 8500 sealer on my porch, and the results exceeded my expectations. Easy to apply, dries quickly, and the surface now repels water perfectly. Very satisfied with this purchase.
            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
              Truly waterproof! Used this on my driveway, sidewalk and brick patio after pressure washing. The next rain we had could see the water bead up and stay on top of the surface. Ended up needing way more product so ordered directly from ghostshield and received it much faster than ordering from Home Depot.
              by
              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
                        Showing 1-10 of 1,332 reviews

                        Compare Key Features

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                        Product Snapshot

                        Ideal for concrete, brick, and masonry; provides excellent waterproofing and protects against salt damage, mold, and mildew.
                        Ideal for enhancing concrete and pavers with a low-gloss wet look, UV protection, and easy application.
                        Ideal for concrete surfaces, this sealer increases strength, reduces dusting, and offers long-lasting protection.
                        Ideal for concrete surfaces, this sealer densifies, hardens, and offers UV and abrasion resistance for enhanced durability.

                        Coverage Area

                        125 sq ft/gallon
                        Up to 400 sq. ft./gallon
                        Up to 400 sq. ft./gallon
                        800 sq ft/gallon

                        Water Resistance

                        UV Protection

                        Drying Time

                        6 hours
                        4-8 hours to touch, 24 hours foot traffic
                        1 hour
                        6 hours

                        Slip Resistance