... under common environment,we can guarantee 15~20 years;and for FR products,it is good at fireproof,and the FR ... (B1). 3) Back:aluminium alloy sheet coated with polyester resin painting. 4) Surface finish: PVDF / PE coated,brushed finish, mirror finish, wooden ... faced,marble faceed ,nano painting ect. 5) Surface coating thickness :25~30 μm 70% KYNAR 500 PVDF or ...