ABOUT CERAMIC FIBER

Joints of duct programs shall be designed considerably airtight by means of tapes, mastics, liquid sealants, gasketing or other accredited closure units. Closure techniques applied with rigid fibrous glass ducts shall comply with UL181A and shall be marked181A-P for strain-sensitive tape, 181A-M for mastic or 181 A-H for warmth-sensitive tape. Clos