Products / Aromatic Urethane 508

Aromatic Urethane 508 is a high-solids, single-component, moisture-cure polyurethane base coat for commercial roof restoration over EPDM, TPO, PVC, modified bitumen, BUR and concrete. It was developed as the base coat of American WeatherStar's Ure-A-Sil system and may also be used beneath Aliphatic Urethane 510 in the Ure-A-Max and Max-Ply urethane systems; it must be top coated with an approved American WeatherStar finish coat such as Silicone 410, High Solids Silicone 412 or Aliphatic Urethane 510. Its product data sheet reports 70 percent solids by volume, 475 percent elongation, 725 psi tensile strength and 0.02 perms, in dark gray, in 5- and 55-gallon packaging.