... 4.Light weight,high strength 5.Fireproof,Water,heatproof Fire resistant A2 B1 dibond aluminium composite panel 1. ... material(B1) ,Noncombustible Inorganic(A2 grade fireproof) .3)Back:aluminium alloy sheet coated with polyester resin painting.4)Surface ... and high strength 2) Excellent heat insulation, sound insulation, fire-resistance, acid-resistance, alkali-resistance, weather resistant and waterproof. ...