(38 customer reviews)


16 oz Sample: $19.88 (samples are not returnable)

1 Gallon Ready to Use: $59.88

1 Gallon Ultra Concentrate:  $299.40 ON SALE NOW: $219.88



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, sidewalks, basements, patios and garages.


1 Gallon Ready to Use Coverage: Up to 125 sq. ft. (includes both coats, two coats are recommended )

1 Gallon Ultra Concentrate Coverage: Up to 625 sq. ft. (includes both coats, two coats are recommended )

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


  • Reduces deicing salt damage, spalling and cracking
  • Reduces freeze-thaw cycle damage
  • Reduces mold and mildew growth
  • Prevents efflorescence
  • Reduces moisture intrusion and water ingress
  • No appearance change to the concrete, dries clear
  • Excellent water beading
  • Easy to apply
  • No odor
  • Will never yellow, fade, peel, crack or bubble


Driveways, sidewalks, patios, pool decks, garages, chimneys, roof tiles and more


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

For enhanced performance on horizontal concrete surfaces use a densifying primer, wait 7 days and then apply the Siloxa-Tek 8500.


  • Color: Milky white, dries clear
  • Finish: Natural, invisible
  • Category: Penetrating concrete sealer
  • Carrier: Water-based
  • Packaging: 1 Gallon Ready to Use, 1 Gallon Ultra Concentrate
  • Reconstitution Ratio: Ultra Concentrate: 1 part sealer : 4 parts water (distilled water is recommended)
  • Interior/Exterior: Interior/Exterior
  • Vertical/Horizontal: Vertical/Horizontal
  • Application Method: Sprayer, Roller, Brush
  • Application Temperature: 40F – 95 F
  • Number of Coats: 2 (coats are applied wet-on-wet)
  • 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

Have an application question, help figuring out the right product for your application or need help calculating your square footage? Give us a call 888-230-5569 or email us:

Additional information

Weight10 lbs

16 oz Sample $19.88, 1 Gallon $59.88, 1 Gallon Ultra Concentrate $219.88

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