100% Solids, moisture mitigation and pH barrier coating

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Product details


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, below and above grade as well as split slabs, thus eliminating delamination of adhesives, floor coverings and coatings. SG3 meets or exceeds the requirements of ASTM F3010-13 Standard Practice for Two-Component Resin Based Membrane-Forming Moisture Mitigation Systems for Use Under Resilient Floor Coverings.

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.


  • One coat system - No sand broadcast
  • Low viscosity, solvent free, no VOC’s
  • For slabs with MVER up to 25 lbs and RH up to 100%
  • ASTM E 96 perm rating ≤0.10
  • Flooring system installed next day
  • Can be applied to damp & green concrete (min. 5 days old)
  • High alkalinity barrier (pH 14)
  • Compatible with most flooring systems
  • Does not support mold growth
  • Great for indoor applications: low odor and non-flammable.
  • SG3 passed Indoor Air Quality Material Emissions Test as per DIN EN ISO 16000 (Report CT-10-06-22-01:250005/2-3)

Typical Applications

  • Indoor and outdoor, new and existing concrete slabs: on grade, above grade, below grade and split slabs, old cementitious underlayment (no gypsum) and ceramic tiles with missing or damaged under-slab vapor barriers.
  • Industrial/retail facilities, office buildings, supermarkets, food processing plants, airplane hangars, hospitals, schools, etc.
  • Use VAPORTIGHT COAT-SG2 for capillary infiltration of oil or other chemicals from the ground or to treat oil-contaminated slabs or radon infiltration.
Article-No. Packaging size Unit/Pallet
3SG3-173K 7.3 gal
1 x 4.6 gal/pail  
1 x 2.7 gal/pail  
  4.6 gal/pail 18
  2.7 gal/pail 40
3SG3-101P 0.24 gal
1 x 0.14 gal/pail  
1 x 0.1 gal/pail  
  0.14 gal/pail
  0.1 gal/pail
3SG3-124P 2.4 gal
1 x 1.5 gal/pail  
1 x 0.9 gal/pail  
  1.5 gal/pail
  0.9 gal/pail