Aromatic Urethane 520
Aromatic Urethane 520 is a high solids, single component, moisture cure polyurethane elastomeric coating uniquely formulated for the protection of sprayed-in-place polyurethane foam insulation and traditional roofing substrates, such as EPDM single ply membrane and BUR surfaces. Once cured this liquid applied moisture-curing polymer provides a durable, seamless, flexible, waterproof membrane that resists lateral movement, shear and will allow for normal expansion and contraction.
Urethane 520 was specifically developed as a protective coating for sprayed-in-place polyurethane foam roofing. With excellent adhesion, Urethane 520 may be used as well for protection of conventional commercial/industrial surfaces such as, but not limited to, EPDM single ply membranes, wood, concrete, masonry, and most types of metals.
All surfaces to be coated must be cleaned properly. Power washing is recommended. Any existing coating must be checked for good adhesion. Before application, any loosely adhered coating must be removed and bare surfaces must be prepared, cleaned and checked for compatibility.
Urethane 520 may be applied by medium nap rollers, soft brushes or conventional airless spray equipment. Apply Urethane 520 only to clean, dry, sound surfaces free of loose particles or other foreign matter. Successive and/or topcoats MUST be applied to the base or intermediate coats within 48 hours to insure proper adhesion.
AVOID MOISTURE CONTAMINATION IN SEALED CONTAINERS. Store in a dry environment at temperatures between 40°F - 100°F. KEEP AWAY FROM HEAT, OPEN FLAME OR SPARKS. USE ONLY IN WELL VENTILATED AREAS WITH PROPER PROTECTIVE EQUIPMENT. Avoid breathing vapor or mist.
American WeatherStar warrants that the material supplied will meet or exceed physical properties as published. The contractor guarantees that workmanship will be free of defects in coating application. Since performance of previously installed substrate is beyond the control of American WeatherStar or the contractor, requests for additional warranty coverage shall be subject to prior approval by American WeatherStar.
Periodic maintenance of all American WeatherStar products, including cleaning, will ensure extended service life and maintain reflectivity.