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This one-page product data sheet covers Aromatic Urethane 508, a high-solids, single-component, moisture-cure polyurethane base coat for commercial roof restoration. The sheet names EPDM, TPO, PVC, modified bitumen, built-up roofing and concrete as surfaces it is designed for. It is listed for Ure-A-Sil, Ure-A-Max and Foam-Gard, and the number PDS-050626 is printed at the top.
The sheet states that the product must be top coated with Silicone 410, High Solids Silicone 412 or Aliphatic Urethane 510. Application is by medium nap roller, soft brush or conventional airless spray, and successive and top coats must be applied within 48 hours.
The technical data lists 70% plus or minus 2 solids by volume, 475 plus or minus 50% elongation, and 725 plus or minus 50 psi tensile strength. It gives 6,000 plus or minus 2,000 cps viscosity, 8.90 plus or minus 0.1 pounds per gallon, a flash point of 80°F, a Shore A hardness of 65, and permeability of .02 perms. Dry-to-touch time is 6 hours, tack-free time is 8 to 12 hours, and recoat time is 12 to 16 hours. The service range is -50°F to 200°F, shelf life is one year, cleanup is with xylene and/or acetone, and the color is dark gray in 5 and 55 gallon packaging.
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