Simiron MVB, Moisture Vapor Barrier Primer, Standard Activator, Part B Only, Clear, 1 Gallon

Surface Preparation: Concrete and coated concrete surfaces must be sound, clean, dry and free of contaminants such as dirt, dust, grease, oil, silicones and other contaminants that may negatively affect adhesion. 

Moisture Vapor Barrier: A suitable moisture barrier must be in place for concrete slabs on-grade. If a moisture barrier is not in place, seasonal variations in ground  moisture can cause excessive moisture vapor transmission (MVT) regardless of results measured prior to coating application. 16 mils 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.

Application: 1.5-Gallon Kits of MVB should not be split Nominal 3-gallon units of MVB Fast cannot be split.

1. Pre-mix Base at low speed for 1 minute. Mix U-Tint into the Base at a rate of no more than 1 pint per gallon (1.5 gallons mixed epoxy). Then, add Activator and mix for three minutes until uniform. Do not mix more material than can be applied in 25–30 minutes (material will stiffen or tack-up).
2. Immediately pour all mixed MVB on the floor in a long bead approximately 8–12 inches wide. Do not attempt to roll material out of a bucket or roller pan.
3. Wearing spiked shoes, and using a notched squeegee, spread material evenly to cover 150 Sq. Ft. for a 1.5-Gallon Kit or 300 Sq. Ft. for a nominal 3-gallon mix. A tight, thin coat of MVB applied as primer with no backroll is the best way to minimize outgassing bubbles. If using this approach, apply the balance of the material after the primer has set to total the coverage rates above.
4. Use a non-shed 3/8 in. roller and back-roll the primer evenly across the squeegee passes to minimize application lines and leave a consistent film thickness.
5. Before overcoating, inspect the applied and set MVB for pinholes or voids from displaced air or inadequate patching. Sand and recoat if needed. Thickened MVB may need to be used to patch more severe holes or cracks.
6. Decorative Chip can be broadcast into the thicker, build coat of MVB before it sets. 

New/Bare Concrete: Diamond grind or shotblast to a CSP 3 or greater surface profile, depending on total thickness of system. Refer to SSPC-SP13/NACE 6 or ICRI Technical Guideline No. 310.2. New concrete must be cured a minimum of 28 days and should meet moisture vapor transmission (MVT) and relative humidity (RH) thresholds as described previously in Surface Preparation section.

Previously Coated Surfaces: Clean surface to prevent any contaminants from being spread/redistributed to a greater area being prepared. Completely remove previous coatings, sealers, joint fillers, and patching materials. Diamond grind or shotblast to a CSP-3 or greater surface profile. Refer to SSPC-SP13 / NACE 6 or ICRI Technical Guideline No. 310.2. 

Dry Time: Open working time: 25-30 Minutes, Tack free: 6 Hours, Light Foot Traffic: 24 Hours, Full Cure: 5 days, all subject to ideal surface & air temerature with relative humidity of 72°F (25°C) 50% RH. Ideal temerature range for application Air Temp: 45°–95°F,  Surface Temp: 45°–95°F, Material to be applied: 60°–85°F. Higher temperatures will shorten the pot-life and open working time with material. Floor temperature must be at least 5 degrees over the current dew point.

Coverage: Mixed MVB is applied at a nominal 16 mils (100 Sq. Ft. per gallon). A 1.5-Gallon Kit covers 150 Sq. Ft. and a 3-gallon mix covers 300 Sq. Ft. A 2.86-gallon mix of MVB Fast also covers 300 Sq. Ft. per gallon

Clean Up: Clean up mixing and application equipment immediately after use with acetone or xylene; do not use alcohol. Follow solvent manufacturer’s safety instructions. Be sure to follow all local, state and federal regulations when disposing of materials.