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.