Supporting photo - Siloxa-Tek 8510

A force unreckonable

The best-performing and longest-lasting concrete sealer in the Siloxa-Tek line will be the last thing to penetrate your concrete for over a decade. The ultimate guardian, it repels just about every nemesis concrete has: water, salt, oil, mold, and mildew.

Versatile & Enduring

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. The only thing easier is our ardent recommendation.

  • Concrete / Brick / Masonry
  • Concrete Blocks / Cinderblocks
  • Pavers / Exposed Aggregate
  • Slate / Stone / Stucco
  • Commercial / Industrial / Retail Floors
  • Stadiums / Plazas / Food Courts
  • Parking Garages / Machine Shops / Shop Floors
  • Driveways / Sidewalks / Patios
Supporting photo - Siloxa-Tek 8510

Dries Invisible

Imbue your concrete with the power of resistance while preserving the original appearance (slight enhancement may occur depending on substrate). Use stand-alone or pair with a densifiying primer for increased performance and abrasion resistance.

Repels Water

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Resists Salt

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Resists Oil

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Higher Actives

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Which is Best for You?

  • 8500 Concrete Sealer Bottle Image
    Siloxa-Tek 8500
    Protects Against
    Water & Salt
    In Stock
    Concentrated & Ready-to-Use
  • /product/siloxa-tek-8510 Concrete Sealer Bottle Image
    Siloxa-Tek 8510
    Protects Against
    Water, Oil & Salt
    In Stock
    Current Product
  • 8505 Concrete Sealer Bottle Image
    Siloxa-Tek 8505
    Protects Against
    Water, Oil & Salt
    In Stock
    Concentrated & Ready-to-Use

Product Details

    • Exceptional waterproofing - Penetrates deep within the concrete chemically reacting within the pores and capillaries creating a long-lasting hydrophobic surface that beads water
    • Resists staining from oil & grease & food exposure - Oleophobic fluorocarbon makes oil and grease easier to clean and remove from treated surfaces decreasing maintenance requirements
    • 100% breathable - Non-film forming. Allows moisture within the concrete to escape without adverse effects to the sealer. Does not trap moisture
    • Provides ease of maintenance - Makes cleaning of staining easier
    • Protects against chloride ion penetration - Forms an effective chloride screen dramatically reducing chloride ion ingress preventing deicing salt / chloride damage
    • Resists oxidization - Inhibits rust and corrosion of rebar in reinforced concrete by limiting substrates water absorption
    • Reduces moisture intrusion - Resists wind-driven rain, prevents freeze-thaw damage, spalling, pitting and cracking.
    • Resists atmospheric staining - Resists mold, mildew and efflorescence
    • 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
    • Solvent carried - Odorless, excellent for cold weather applications
    • Excellent penetration depth into any concrete, brick or masonry substrate.
  • Surface Preparation

    1. New “green” concrete must be properly cured. Concrete should obtain 80% of design strength, typically achieved within 14-28 days.
    2. The concrete substrate must be structurally sound and clean of oil, grease, dirt, wax, curing compounds, efflorescence, paints, previous sealers, adhesives and other contaminants that might interfere with the penetration of the sealer. Power wash, acid etch or mechanically scarify as necessary to achieve the desired surface condition. Allow for proper dry time before application. The surface-zone moisture content of the concrete should not exceed 4% wt. Do not apply if standing water is visible.
    3. Surface and air temperatures must be at least 35°F during application. Surface and air temperatures should not exceed 95°F. Do not apply when temperatures are expected to fall below 32°F within 8 hours or when rain is expected within 12 hours following application. Keep material from freezing. If freezing conditions exist before application, let the substrate thaw before application. Do not apply during inclement weather or when inclement weather is expected within 12 hours.
    4. Crack, patching and expansion joint sealants can be applied before application; always test for compatibility and adhesion.
    5. Protect people, property, vehicles, window glass, roofing materials, plastic products, shrubbery, landscaping and all surfaces not set for treatment from overspray. Application

    6. Always test a small area before application to ensure desired performance, aesthetics, coverage rates and to verify application technique. Let test area dry thoroughly, 5-7 days, before inspection.
    7. Stir material throughly before and during application. Do not dilute or alter material for purposes other than specified.
    8. Apply with a solvent-resistant roller, brush or low-pressure, non- atomizing sprayer. Apply to saturation letting the first coat penetrate for 5-10 minutes. If applying a second coat, reapply in the same saturating manner wet-on-wet (applying the second coat before the first coat dries). Less material will be needed for the second coat. Roll or broom out any puddles until the sealer penetrates the substrate. If it starts to rain, stop treatment and cover the impregnated areas.

    Dry Time

    Typical drying time is 4-6 hours at 70°F and 50% relative humidity. Cooler temperatures or higher relative humidity can extend the drying time. Treated surfaces will be ready for pedestrian and vehicle traffic within 24 hours. Water repellency will continue to develop within 7 days of application.

    Clean Up

    Clean equipment and tools with xylene or mineral spirits. Unused or old material may be disposed of in a waste disposal site in accordance with local, state and federal laws.


    Avoid contact with skin, eyes and clothing, do not take internally. Use appropriate safety equipment during application and handling. Please refer to the safety data sheet (SDS) for additional precautionary instructions before use. For medical emergencies only, call ChemTrec (1-800-424-9300).

    Best Performance

    • Proper application is the responsibility of the user.
    • Will not inhibit water penetration through unsound or cracked surfaces with defective flashing, caulking or structural waterproofing.
    • Spills should not be allowed to sit for extended periods of time, clean all spills in a timely manner.
    • Make sure the most current versions of product data sheets and safety data sheets are being used.


    150 - 400 square feet per gallon (apply at a coverage rate to obtain the desired repellent effect). Variations in texture and porosity of substrate will affect the coverage and performance of the product.

  • What does wet-on-wet mean? Wet-on-wet means that the second coat is applied while the first coat is still wet. Two coats of the Siloxa-Tek 8510 are required wet-on-wet. The second coat is applied immediately after the first coat while the first coat is still wet, since the Siloxa-Tek 8510 is a hydrophobic product it will try to repel the second coat if the second coat is applied after the first coat has dried.

    Can I walk on the first coat to apply the second coat? Yes, you can walk on the first coat to apply the second coat. Since the Siloxa-Tek 8510 is a penetrating sealer it will dry invisible and will not show footprints.

    Can I paint after sealing? In order to continue repelling oils and staining we do not recommend painting over the Siloxa-Tek 8510.

    Does the concrete need to be dry before sealing? Yes, the concrete needs to be as dry as possible before sealing. We recommend the moisture content of the concrete be less than 4%wt. It is recommended to wait at least 24-48 hours after rain and pressure washing before sealing.

    What can I use to apply this product? The Siloxa-Tek 8510 can be applied with a 3/8" nap paint roller or a brush.

    How do I get oil stains out of my concrete? We recommend a highly concentrated, oil busting dish soap, such as Dawn. Squirt it over the stain and spread it around to cover the entire affected area. Let it sit for about an hour, then mop up the dish soap and oil with a paper towel.

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