CP-500 W™
Water Based Siloxane-Silane water Repellent Sealer


CP-500W™  is an architectural spec grade water repellent that protects porous building materials from water damage, surface staining, and corrosion. CP-500W™ can be used to protect horizontal surfaces as well as vertical surfaces including those with leaks or where extra protection is desired.  Examples of applications include: 

  • Pavements
  • Sidewalks/Plazas
  • Countertops
  • Bridges
  • Parking Decks
  • Airport Taxiways and Aprons
  • Piers and Marine Structures
  • Brick, Stone, Concrete, and Stucco Vertical Structures

Silane Water Repellent Sealer

CP-500W™ also protects surfaces requiring outstanding corrosion resistance and protection from chloride penetration. Treated surfaces will remain protected for 5+ years.

water repellent


CP-500W™ works by penetrating and reacting with the silica in concrete and other building materials in the presence of ultraviolet light and atmospheric moisture. The strong chemical bond formed as a consequence of the reaction imparts hydrophobic properties beneath the surface that prevents water molecules from seeping in, while allowing free migration of water vapors. The bond formed in this process is what allows CP-500W™ to become an integral part of the substrate and provide long-term protection.

water bead on concrete surface

CP-500W™ protects surfaces from water penetration even when hairline cracks are present.

CP-500W™ can be used to treat surfaces including, but not limited to:

  • Architectural precast or cast in place
  • Concrete
  • Brick
  • Mortar
  • Natural stone
  • Limestone
  • Granite
  • Sandstone
  • Terra Cotta
  • Ceramic tile and grout
  • Adobe
  • Exposed aggregate products
  • Portland cement stuccos
  • Plaster and concrete masonry units
Different sizes of container for Cp-500W

Product Benefits

Provides long lasting 5+ years protection

Protects against water damage, staining and corrosion

Resists water penetration, even at hairline cracks

Performs exceptionally well on porous substrates

Requires no job site dilution or two-part mixture (ready to use)

Dries clear - non glossy finish

Is environmentally friendly

Customer Testimonials:

“CP-500W has proven to be a cost effective, high performing, water repellent solution for our customers in Houston, TX, and surrounding areas for over 20 years. CP-500W is a versatile product that can be used on many surfaces both new and existing. We recommend CP-500W as often as we can.”

Mark Maraviglia - Builders Products Inc.

“We have used CP-500W successfully for over 10 years for all types of waterproofing applications. From aftermarket masonry rehab work to new construction, CP-500W is our first choice.”

Jake Barnhart - Restoration & Waterproofing Professional

“We tried everything to stop a 15 year leak through our stucco building facade. We applied a heavy coat of CP-500W and have not had any leakage since. CP-500W is an amazing product!”

Jennifer - Kansas City Homeowner

Related Products:

CP-500 Premium™ Siloxane Water Repellent
Stainguard-50™ Oleophobic Impregnator Sealer
SW-244-100 VOC™ Silane Water Repellent
CP-1007™ Densifier Hardener


Have a question? Need a quote? Our technical staff is here to help you identify the right solution for your project requirements.