... water preservation, poisonless, odorless, low hardness, burning-avoidness, lighter.non-asbestos ,Low density etc2.Expanded vermiculite size ... Insulation in Steelworks and FoundriesGood thermal insulation, low density and its natural refractory properties combine with ... of screed has the advantages of low thermal conductivity, low moisture content and ease of placement.Refractory ProductsVermiculite ...