This product has a high UV inhibiting protection system to the weather face. Fire Rating is FILON Grade 300 AB Class 3 to BS476 parts 3 & 7. FILON rooflights are manufactured from glass reinforced polyester resin (GRP), with unique light diffusing additives which scatter light passing through, to provide effective daylighting without hot spots or excessive glare. They are available in over 900 different profiles, to match all current and most discontinued asbestos cement and metal roofing profiles. FILON GRP rooflights may be used in single skin and double skin site assembled applications and where necessary, including insulating intermediate layers to provide improved insulation levels for compliance with current legislation. FILON GRP rooflights are available in various weights including 1.83kg/m², 2.44kg/m², 3.06kg/m² and 3.66kg.m². FILON rooflights have excellent impact resistance and are supplied with a highly durable UV resistant polyester film to the weather face. This extends the durable working life of the sheet and the UV resistance limits sheet yellowing. Under normal conditions, sheet life should be in excess of 30 years. FILON standard range of profiled rooflights and sheets are available at weights required to provide Class C and Class B non-fragile ratings in accordance with ACR(M)001:2011.