MavCoat MVB Moisture Vapor Barrier Primer

Where MavCoat MVB Is Used

• Use under all Maverick coating systems where MVT resistance is desired
• Broadcast 1/4” decorative chip directly into MavCoat MVB
• New concrete
• Concrete slabs that have shown issues in applied polymer flooring

Read Before Specifying

• 16 total mils of MavCoat MVB (15.3 mils MavCoat MVB Fast) must be applied to achieve MVT resistance up to 25 lbs. per 1000 sq. ft. in 24 hours per ASTM F1869 or 95% RH per ASTM F2170.
• MavCoat MVB is not designed to be used as a stand-alone product. MavCoat MVB must be over-coated with a more durable Maverick coating system.
• Concrete must have a minimum compressive strength of 3,500 psi and a tensile strength of 300 psi.
• This product will not prevent failures caused by Alkali-Silica Reaction (ASR) or contaminants left by previously applied hardeners/sealers.
• Do not apply at a temperature or thickness not recommended.
• Do not delay in pouring mixed material onto the floor.
• Do not apply over loose or unsound concrete, asphalt or bitumen substrates, glazed tile or nonporous brick and tile, magnesite, copper, metal, polyesters, or elastomeric membranes.
• Moving joints and shrinkage cracks may reflect through the system. Joints that are designed to move may reflect through the finished flooring system if they are not honored.
• Do not allow materials to freeze.

Substrate Requirements

Concrete and coated concrete surfaces must be sound, clean, dry and free of dirt, dust, grease, oil, silicones and other contaminants that may affect adhesion. A suitable moisture barrier must be in place for slabs on grade, since seasonal variations in ground moisture can cause excessive MVT regardless of pre-application readings; 16 mils of MavCoat MVB is resistant to MVT up to 25 lbs. per 1000 sq. ft. in 24 hours per ASTM F1869 or 95% RH per ASTM F2170. New or bare concrete is diamond ground or shotblasted to a CSP 3 or greater profile depending on total system thickness (SSPC-SP13/NACE 6 or ICRI Guideline No. 310.2). Previously coated surfaces are cleaned, then thoroughly ground with 30 grit metal diamonds to completely remove any grout or topcoats that are not epoxy based. All previous joint filler and patching materials must be completely removed before application. Air, surface and material temperatures should be 60° – 85°F (16° – 29°C), with the floor at least 5 degrees above the dew point; MavCoat MVB with the Fast Part-B can be used down to 50°F.

Mixing and Installation

Pre-mix Part-A at low speed for 1 minute, mixing in MavTints at no more than 1 pint per 1.5 mixed gallons (2 pints per 3-gallon kit), then add Part-B and mix for three minutes until uniform; do not mix more than can be applied in 25 – 30 minutes, and never split a kit. Immediately pour all mixed material onto the floor in a long bead approximately 8 – 12 inches wide rather than rolling from a bucket or pan. Wearing spiked shoes, spread with a notched squeegee to cover 300 sq. ft. per kit; a tight, thin prime coat with no back-roll is the best way to minimize outgassing bubbles, with the balance of the material applied after the primer has set to reach the full coverage rate. Back-roll with a non-shed 3/8” roller across the squeegee passes to leave a consistent film thickness. Before overcoating, inspect the set MavCoat MVB for pinholes or voids and sand and recoat if needed; thickened MavCoat MVB may be used to patch more severe holes or cracks. Apply the second coat or the topcoat within 24 hours of the initial coat; if the recoat window is missed, the coating system will need to be sanded.

Full step-by-step instructions, pot life and recoat windows are in the MavCoat MVB product data sheet. Maverick installs MavCoat MVB with its own crews.