CCS Coating MVR Primer

CCS MVR Primer is a two-component, solvent-free epoxy primer designed for use on slab-on-grade concrete floors experiencing high moisture vapor transmission. It serves as a vapor barrier, reducing moisture vapor transmission rates from up to 25 lbs./1000 ft²/24 hr to below 3 lbs., thereby meeting the requirements for the installation of impervious floor coatings and coverings.

This product is used as a primer layer in floor coating systems, enhancing adhesion and performance of the topcoat. It features a 2:1 mix ratio (Part A: Resin, Part B: Hardener) and does not contain VOCs. It may be used in conjunction with impervious floor coatings or adhesives applied after the primer has set.

·         Slab-on-grade concrete floors (dry or damp)

·         Environments requiring moisture vapor transmission control

·         Pre-installation for impervious floor coverings (above and below grade)

·         Industrial settings exposed to automotive and aircraft chemicals

·         Application Method: Apply using a 3/32” notched squeegee and back-roll with a 3/8” nap roller.

·         Primer Thickness: 15 mils (wet film thickness)

·         Coverage: 95–120 ft²/gallon, depending on substrate porosity

·         Surface Preparation: Must be free from contaminants and prepared according to ASTM D4259 or ACI 503R standards. Concrete should have minimum tensile strength of 250 psi.

·         Set Time Before Topcoat: 10–12 hours at 73°F. Topcoat must be applied while surface remains tacky.

·         Cure Times:

o        50°F: 12 hours

o        73°F: 10 hours

o        90°F: 8 hours

·         Full Gel Time: 45 minutes at 250g mass

·         Post-24 Hour Application: Apply 30-40 mesh kiln-dried aggregate at 2 lb/yd² for better mechanical adhesion.

·         Minimum Installation Temperature: 50°F. Apply after the substrate has reached peak daily temperature.

·         Humidity and Moisture Tolerance: Can be applied to dry or slightly damp concrete.

·         UV Resistance: Not specified as UV-stable; not intended for exposed applications without topcoat.

·         Shelf Life: Minimum of three years in original, unopened containers stored between 60–90°F.

·         Color: Clear amber when mixed.

·         Chemical Resistance: High resistance to automotive and aircraft fluids; limited resistance to hydrocarbon solvents.

Safety Notes: Use with proper PPE. Both components have moderate health hazards. Avoid contact and inhalation