Polyurethane 501 Sealer Glossy

Surface Preparation

Surface must be clean, structurally sound and free of chalk, wax, loose paint or curing compounds. Application over concrete requires the use of a primer. Previously coated surfaces must be mechanically cleaned and abraded with 100 grit sandpaper or sanding screen to ensure intercoat adhesion.

Mixing Instructions

Mix only that amount of material that can be used in a 3 hour period at 77°F. Higher temperatures reduce work time. In hot weather, it is advisable to mix smaller batches. Premix Part A before adding part B. Mixing ratio is 2 parts A to 1 part B. Add part B slowly while mechanically agitating part A with a slow speed drill. Mix for 2 full minutes until completely homogenized. Material cannot be properly mixed by hand. Use a small “squirrel cage” mixer for mixing small amounts.

Thinning

Material is normally applied as received but may be thinned with water up to 10% during application to keep a low viscosity. Any reduction water must be added after part A and B have been drill mixed.

Application Recommendations

Polyurethane 501 should be applied 200–350 sq ft per gallon by brush, roller or airless sprayer. Do not allow to puddle or accumulate in joint areas. Applications heavier than 200 sq ft per gallon will create bubbles in the cured coating. If multiple coats are required, and the material has cured for more than 24 hours, degloss with a black janitorial pad or fine sanding screen.

Handling Precautions

Use only with adequate ventilation. An appropriate cartridge-type respirator must be used during application in confined areas. Avoid contact with skin; wear protective gloves. Read Material Safety Data Sheet before using.

Slip and Fall Precautions

OSHA and the American Disabilities Act (ADA) have now set enforceable standards for slip-resistance on pedestrian surfaces. The current coefficient of friction required by ADA is 0.6 on level surfaces and 0.8 on ramps. Arizona Polymer Flooring recommends the use of angular slip-resistant aggregate in all coatings or flooring systems that may be exposed to wet, oily or greasy conditions. It is the contractor and end users’ responsibility to provide a flooring system that meets current safety standards.