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Rocksteel RS500:
Professional Ultra Porous

Ultra Porous is a solvent based; non-yellowing, transparent heavy duty silicone sealant specifically formulated for higher porous substrates. Ultra Porous immediately molecularly bonds with the material upon which it is applied and forms a revolutionary seamless, durable, clear polymeric barrier that repels water, salts, pool chemicals, oils, gasoline and resists staining from many food types. Ultra Porous will darken, enhance, and bring out the colors in most substrates.



  • State-of-the-art, heavy duty silicone protection against salt water damage
  • Perfect for natural and very porous stone and masonry surfaces around salt water pools
  • Uniformly enhances/darkens the look and appeal of stone
  • Helps retard efflorescence
  • Helps resist many water based stains, makes stain removal easier
  • Easiest application in the industry,
    use indoors or outdoors
  • Fast curing, begins bonding in seconds, cures in 20-30 minutes
  • Impervious to immediate rainfall
    Can be applied to damp surfaces


COVERAGE: For porous stone: depending upon the porosity of the surface, 200 sq. ft. to 350 sq. ft. Always test an area before application. See application instructions for important application and use details.
Flash PointVOC ContentColorUnit
54°F 787g/L Transparent 1g/3.79L

We will strive to exceed every customer’s expectations. In the case that a customer is less than satisfied, we will perform additional services to correct the issues, however, no refunds will be given.