Inside Layer:Siliconed Internal Lining Middle Layer:Yarn Mesh Outside Layer: Kraft Paper Capacity: 25 kgs Max. Temperature : more than 200 C (centigrade degree) The Bitumen will not stick on the inner liner when dumping Pile up: up to 200 layers max. under certain conditions Packing: need not carton packed Especially for hot Blown/Oxidized bitumen packing.