Penetrating Water & Salt Repellent Siloxa-Tek® 8500
Versatile, invisible, enduring—the criterion of penetrating concrete sealer.
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, patiors and basements.
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 for increased performance and abrasion resistance.
Application - Ready to Use
Application - Ultra Concentrate
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 equipment, tools and surfaces with hot soapy water. 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.
1 coat: 150 - 400 square feet per gallon. 2 coats: 75 - 200 square feet per gallon. Variations in texture and porosity of substrate will affect the coverage and performance of the product.
NCHRP 244 Report Series II Reduction in Water Absorption: 1 day: 82%; 5 days: 81%; 21 days: 77%; Average 80% Reduction in Chloride Ion Content: 1 day: 79%; 5 Days: 83%; 21 days: 86%; Average 83%
NCHRP 244 Report Series IV Southern Exposure Accelerated Weathering Test Resistance to UV Light : No discoloration Reduction in Soluble Chloride: 93% reduction in soluble chloride
ASTM E 514-86 Water Penetration and Leakage Through Masonry: 90% reduction in leakage rate
ASTM E 96-95 Water Vapor Transmission: Up 3 (Untreated 3.5) Down 2.5 (Untreated 3.3)
ASTM C 672-92 Scaling Resistance to Deicing Chemicals: Control: 40 cycles; After treatment: 80 cycles
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 8500 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 8500 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 8500 is a penetrating sealer it will dry invisible and will not show footprints.
Can I paint after sealing? Yes, you can paint after applying the Siloxa-Tek 8500 as long as an oil or enamel based paint is used. Since the Siloxa-Tek 8500 is a hydrophobic sealer it will repel any latex or water based paints.
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 is the difference between Siloxa-Tek 8500 ready to use and Siloxa-Tek 8500 ultra concentrate? The Siloxa-Tek 8500 is available in a ready to use gallon or an ultra concentrated gallon. The ready to use gallon is ready to use right out of the container and requires no mixing with water. The ultra concentrated gallon is mixed with 4 gallons of water to make a 5 gallon bucket of sealer. The ready to use gallon will cover up to 250 square feet per gallon per coat. The ultra concentrated gallon will cover up to 1250 square feet per container per coat. If you have a large amount of square footage the ultra concentrated gallon is a great option.
What do you mix the concentrate with? The Siloxa-Tek 8500 ultra concentrate is mixed with water. 1 gallon of Siloxa-Tek 8500 ultra concentrate is mixed with 4 gallons of water.
How do I mix the Siloxa-Tek 8500 ultra concentrated product with water? The Siloxa-Tek 8500 ultra concentrate is a concentrated product that needs to be mixed with water prior to application. Pour the 1 gallon of Siloxa-Tek 8500 into a 5 gallon bucket. Next add 4 gallons of water into the 5 gallon bucket. Mix the water and 8500 mixture well. You can then pour the mixture into a sprayer to spray apply, or you can dip a nap paint roller into the bucket and roll apply.
How many gallons do I need to treat 1250 square feet? The Siloxa-Tek 8500 is available in a ready to use gallon or an ultra concentrated gallon. The ready to use gallon will cover up to 250 square feet per gallon per coat. The ultra concentrated gallon will cover up to 1250 square feet per container per coat. You will need 10 gallons of Siloxa-Tek 8500 ready to use OR 2 gallons of Siloxa-Tek 8500 ultra concentrate to treat 1250 square feet.
What can I use to apply this product? The Siloxa-Tek 8500 can be applied with a garden variety pump sprayer, 3/8" nap paint roller or a brush.
How do I clean out the sprayer after sealing? Since the Siloxa-Tek 8500 is a water based product you can use regular soap and water to clean out the sprayer and other application tools.