THERMO-SIL SP-11 (Silicone Epoxy Primer)

Thermo-Sil SP-11 is a black, single-component epoxy primer incorporating state-of-the-art water-based technology to produce an extremely versatile product that penetrates and seals porous substrates. It is effective at increasing the bond of silicone topcoats to a variety of surfaces and will also help to “solidify” punky or chalky surfaces.

SP-11 is safe to use, has very little odor and is easy to clean. It is designed to penetrate and seal porous substrates to improve the adhesion of Huntsman Building Solutions' Thermo-Sil series of silicone coatings. It develops a tenacious bond to concrete, wood, fiberglass, steel, galvanized and aluminum surfaces.

Product Benefits

  • Adhesion - penetrates and “wets” into porous surfaces, imparting a tenacious chemical and physical bond between the substrate and topcoat
  • Easy cleanup and minimum maintenance
  • Deep penetrating to preserve dense surfaces
  • Anti-spalling - protects against the intrusion of destructive salts, oils, solvents and gasoline