PROFLEX™ MS-225 Moisture Vapor Reducer is a polymer based, solvent free product with multiple uses. MS-225 will reduce vapor emission levels on concrete slabs from 9lbs or 85% RH down to acceptable levels. MS-225 can also be used on concrete slabs with moisture levels up to 12lbs or 90% RH when used in a two-coat application. MS-225 also encapsulates old adhesive residue, (including cut-back asphalt adhesive residue), can seal dusty substrates, reduce porosity of gypsum and is alkali resistant.





  • Reduces Moisture Vapor transmission up to 12 lbs or 90% Rh
  • May be used as a Primer for PROFLEX elastomeric membranes in place of the PR-Series Primers where slabs exceed 5#/1000sqft.-24 hours vapor transmission.
  • Seals Dusty Substrates, Reduces porosity of Gypsum, Alkali resistant
  • Ideal for Fast-Track projects for concrete slabs not at full cure time (28 days)

Suitable Surfaces

  • Concrete (Poured,Prestressed, Precast)
  • Concrete Backerboards
  • Cured (Mortar Beds, Self Leveling Compounds, Gypcrete)
  • Wood (Exterior Grade Plywood, Hardwood, Tongue and Groove, OSB)

Coverages, Packaging

  • 1 Gallon (3.87l) Container, 4 Containers/ Carton
  • 4 Gallon (15.48l) Container, 48 Containers/ Pallet
  • For surfaces requiring up to 9#/1000sqft. or 85% rH 300sq.ft per gallon in a single coat application
  • For surfaces requiring up to 12#/1000sqft. or 90% rH 225sq.ft per gallon in a two coat application

Data Sheets

Requires Adobe Reader Data Sheet

Requires Adobe Reader Material Safety Data Sheet

Warranty based on the system of materials used to install finish flooring products.
Please refer to our full warranty information for specific terms and conditions.