MavTop UQB-HD Urethane Quartz Broadcast System

Substrate Requirements

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; scrub with detergent, rinse clean, and remove paint or coatings. New concrete should be cured a minimum of 14 days and reach a minimum 3,500 psi compressive strength, with a minimum pull-off strength of 300 PSI per ASTM D4541; early curing movement, shrinkage or cracking will reflect through the overlay. Remove any laitance or weak surface layers including broom-finished concrete. Mechanically prep floors to CSP 3 – 5 (ICRI guideline, equal to 40-grit sandpaper or coarser); diamond grind walls receiving cove to CSP-3 per SSPC-SP13/NACE 6 or ICRI Technical Guideline No. 310.2, and sand (do not grind) cement board walls. Vacuum all debris. Tape perimeter terminations and sawcut and key in all termination points at doorways, joints, drains, dock plates and high-traffic impact points with keyways a minimum of 5/16" wide x 5/16" deep to prevent lifting or delamination. Cracks, holes and spalled areas that will not cover are skim-coated with MavTop UQB-HD and scraped flush; areas deeper than 1/4" are patched with a cementitious material and prepared as above. Honor isolation, expansion and movable joints after installation; contraction (sawcut) joints may be filled and coated over but may crack with excessive slab movement.

Mixing and Installation

Installation is by trained persons experienced in polyurethane concrete flooring applications. Using a proper mixer and paddle to avoid introducing excess air, pour 1/2 gallon Part-A into the pail, add 1/2 pint MavTints if pigmenting and mix about 15 seconds, add 1/2 gallon Part-B and mix another 15 seconds, then gradually add the full MavTop UQB-HD filler bag and blend until all particles are wetted out (about two minutes). Within 3 minutes of mixing, spread the material with a cam rake or trowel at approximately 3/16" for a 1/4" finished floor, laying abutting edges within 10 minutes to keep a wet edge; back-roll with a spike roller to settle the filler and blend rake lines, then roll with a loop/texture roller perpendicular to the rake lines. Broadcast colored quartz to rejection onto the wet slurry (approximately .75 lbs./sq. ft.) once settling and back-rolling are complete, continuing until no wet areas remain. After curing approximately 6 – 8 hours to withstand foot traffic, sweep and vacuum all excess quartz, then apply the specified topcoat to lock the system and achieve the desired slip resistance. MavSeal UPA Slow Cure is mixed 1 part Base to 1 part Activator by volume in full kits only, applied by flat or notched EPDM squeegee at 100 – 134 sq. ft. per gallon (12 – 16 mils wet) and back-rolled with a non-shed 3/8" roller, or dip-and-rolled with an 18" roller in hot or humid conditions; keep mix-to-mix tie-ins within 5 – 10 minutes and use joints as natural breaks. A second 6 – 8 mil coat (no more than 200 sq. ft. per gal.) may be applied within 24 hours for less texture. The urethane cement can be applied in cool conditions down to 40°F; below 60°F use MavSeal UPA Fast Cure. Where a cove base is specified, a Maverick epoxy primer is applied to the wall first and the system's urethane cove base mortar is troweled at 1/8" – 3/16" to a standard 4" height and finished with a cove trowel.

Full step-by-step instructions, pot life and recoat windows are in the MavTop UQB-HD system guide. Maverick installs MavTop UQB-HD with its own crews.