... epoxy cloth, perlite (Without : asbestos, formaldehyde, benzene) Appl Materials: magnesium chloride, magnesia, alkali endured epoxy cloth, perlite (Without : asbestos, ... and poison, non-flammable, free from smog, high intensity, light quality, sound insulation, heat preservation, waterproof, fireproof, free from ... such harmful elements as asbestos, formaldehyde or benzene. magnesium oxide board