Cofficient of thermai conductivity. Sound absorption performance is good, not burning chemical stability is good wait for a characteristic. It is a new type of insulation, sound absorption material. Rock wool products except wite general rock wool is special point, but also a waterproof, heat preservation and heat insulation every cold, such as performance, have certain chemical stability, even in moist use for a long time From 30kg/m3 to 200kg/m3