THE SINGLE BEST STRATEGY TO USE FOR RUBBER INSULATION

Joints of duct methods shall be manufactured considerably airtight by way of tapes, mastics, liquid sealants, gasketing or other permitted closure units. Closure units utilised with rigid fibrous glass ducts shall adjust to UL181A and shall be marked181A-P for force-sensitive tape, 181A-M for mastic or 181 A-H for heat-delicate tape. Closure device