Aluminium-Silicate Wool Board 1. waterproof, sound, heat insulation 2. excellent quality 3 ... surface may be coated with metal mesh (single side, double sides), fiber glass cloth (single side, double sides, six sides), ... fiberglass blanket (single side, double sides), or aluminium foil (single side, double sides). Specification and physical- ... <0.2<0.2<0.2 ceramic wool board