Apply 500MR Mastic Remover directly on the concrete surface. Spread 500MR around with a straw broom, long handled brush or squeegee using light pressure. If applying to mastic with trowel ridges, cover all trowel ridges with product. Allow 500MR to sit until mastic softens. (Generally asbestos/black mastics will soften in 1-2 hours, and vinyl or acrylic mastics will soften in 4-8 hours.) After mastic has softened, remove with a long handled scraper or squeegee. Reapply if necessary.
Clean remaining thin residue with BLUE BEAR 700DG Degreaser or water using a scrub brush and/or mop or power washer. Allow surface to dry before further preparations.
After rinsing, apply water to various small areas on the concrete and rub with fingers. If water turns cloudy white, it indicates there is 500MR remaining on the surface. Repeat clean up steps and retest.
One gallon will generally cover between 100-200 sq. ft. Many customers report getting up to 200 sq. ft. per gallon.
Usage Tips From The Pros:
Use a commercial sprayer or metal watering can to apply 500MR in large areas.
Protect floor drains and areas where product would naturally flow on uneven surfaces with sand, Oil-Dri, or kitty liter.
A rotary floor machine used on a low RPM speed helps during the water/degreaser clean up steps. Use only after scraping up softened mastic.
Safe for use on: Concrete.
pH Level: 6.5
VOC (Volatile Organic Compounds) 2.3%, .06 lb/g, 20 g/l
DO NOT USE ON WOOD SURFACES.