... Coating: PVDF, PE 5) Kaidi Co coated aluminium coil for roof sheet:01) Alloy: A1100,A1050,A3003,A3004,A3005,A3105,etc02) ... 18 micron09) Coating hardness (pencil hardness) more than 2H10) coating adhesive : no lower than first grade11) Impact resistance: No cracking ... 2T13) MEK resistance: more than 10014) Bottom side aluminum sheet is coated with protective polyester material, thickness more than 5 ...