MGO perlite board, MGO foam board fireproof door core spec Thickness: 25mm, 36mm, 48mm, ... and self-extinguishing, thermal insulation, soundproof and sound absorption, mould proofing, damp proof, waterproof, shockproof, color weatherproof2) Non-corrosive ... the substitution of wood.Applications: 1) Advertising field: sign board, billboard, exhibition display, silk screen printing, laser engraving ...