INDICATORS ON CERAMIC FIBER YOU SHOULD KNOW

Joints of duct devices shall be designed considerably airtight via tapes, mastics, liquid sealants, gasketing or other approved closure units. Closure devices applied with rigid fibrous glass ducts shall comply with UL181A and shall be marked181A-P for force-delicate tape, 181A-M for mastic or 181 A-H for warmth-sensitive tape. Closure methods empl