Rockinsul Loose Wool Insulation: Rockinsul Loose Wool Insulation is specially graded and designed to in-fill around pipe bundles and to completely fill irregular voids. They can be installed either by hand packing or by using specially designed blowing equipment. Rockinsul Loose Wool is also used in non-asbestos organic formulations for friction products, such as railway brakes, commercial vehicle and passenger car linings and disc pads, clutch facings etc. It has excellent performance characteristics and offers distinct advantages over traditional filler/reinforcing materials.