100% Solids moisture vapor reduction system



VAPORTIGHT COAT-SG3 is a unique 2-component, moisture tolerant, low viscosity, solvent free, chemically enhanced epoxy based product which reduces the passage of water vapor and moisture through slabs on or below grade, thus eliminating delamination of adhesives, floor coverings and coatings.

SG3 reduces water vapor transmission levels of up to 25 lbs/24 hrs * 1000 ft² to 3 lbs or less for the installation of most floor covering systems including VCT, sheet vinyl, carpets, wood, laminates, epoxy, terrazzo & synthetic.

For a faster cure use SG2/3-ACCELERATOR and speed up cure times to 4 - 5 hours.

Typical Applications:

  • On existing and fresh concrete slabs (min. 5 days old)
  • Industrial/retail facilities
  • Office buildings
  • Hospitals and schools
  • Food processing plants
  • Any slabs with moisture vapor problems
  • Call AQUAFIN for slabs with floor heating, residential slabs below grade and garages


  • Reduces MVER (Moisture Vapor Emission Rate) of up to 25 lbs/24 hrs * 1000 ft² to 3 lbs or less
  • Solvent free - no VOC's
  • Water and vapor barrier
  • Compatible with most flooring systems
  • Low viscosity
  • Meets USDA/FSIS guidelines
  • Does not support mold
  • Easy to install
  • Minimal downtime

CSI Divisions:

  • Epoxy Coatings (09 96 56)
  • Vapor Retarders (07 26 00)

Complementary Products:

Item numberPackaging
3SG3-124P2.4 gal
resin1 x 1.5 gal pail
hardener1 x 0.9 gal container
3SG3-173K7.3 gal
resin1 x 4.6 gal pail
hardener1 x 2.7 gal pail


Texas A&M - McFerrin Athletic Center

Texas A&M - McFerrin Athletic Center


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