FelTex premium grade roof underlayment is now available with a high-performance, next-generation self-adhered backing. FelTex SA300 uses the trusted technology of premium grade FelTex, making it one of the strongest, most reliable and best-performing synthetic self-adhered roof underlayments on the market. It is unrivaled in its ease of application, requires no back-nailing in the field of the roof, does not require priming at low temperatures, and remains stable at extreme temperatures. FelTex SA300 is also known for its exceptional UV resistance (six months). It meets or exceeds code and industry nail sealability tests, and offers the most walkable surface in the industry with a proprietary Fiber Claw woven fabric surface. FelTex SA300 is rated for commercial and residential applications, and is an ideal self-adhering underlayment for projects subject to ice damming and severe weather.