... ,high strength 5.Fireproof,Water,heatproof Fire resistant A2 B1 dibond aluminium composite panel 1.Aluminium Composite panel structurer ... thickness0.15~0.5mmCore MaterialUnbroken LDPE or Fireproof A2 ,B1 Surface CoatingPVDF or PE 3.aluminium composite panel Material ... toxic unbroken A grade Low-density polyethylene or fireproof material(B1) ,Noncombustible Inorganic(A2 grade fireproof) .3)Back:aluminium ...