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Two-component, polymer-modified, cementitious leveling/pore sealing mortar plus FerroGard 901 penetrating corrosion inhibitor

Product Data Sheet



SikaTop 121 PLUS is a two component, polymer-modified, leveling and pore sealing mortar with the additional benefit of FerroGard 901, penetrating corrosion inhibitor. SikaTop 121 PLUS provides a smooth substrate, free of irregularities and bug holes for following protective coatings.

Where to Use

  • As a leveling/pore sealing mortar prior to protective coatings.
  • On horizontal, vertical and overhead surfaces, interior and exterior.
  • On grade, above and below grade, on concrete and mortar substrates.
  • Block filler.
  • Minor repair for gouges and broken edges.


  • Excellent adhesion to concrete and mortar substrates.
  • High flexural and compressive strengths.
  • Increased density - improved carbon dioxide resistance (carbonation) without adversely affecting water vapor transmission (not a vapor barrier).
  • Increased freeze/thaw durability and resistance to deicing salts.
  • Adds effective cover over rebars.
  • Enhanced with FerroGard® 901, a penetrating corrosion inhibitor - reduces corrosion even in the adjacent concrete.
  • Compatible with coefficient of thermal expansion of concrete - Passes ASTM C-884 (modified).
  • Can be applied over Sika® FerroGard 903, corrosion inhibiting impregnation.
  • Not flammable


  • 0.4 cu. ft./unit; One unit covers approximately 65 sq. ft. (6 m2) of smooth surface at 1/12 inch (2 mm) thickness

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