FOSTER MONOLAR II MASTIC based on chlorosulfonated polyethylene rubber (formerly known as Hypalon*) is a tough, flexible, fire-resistive, elastomeric finish for protection of thermal insulation. It is also used as a vapor retarder finish for fittings.
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nMONOLAR II MASTIC is produced under the classification and follow up service of Underwriter’s Laboratories, Inc.
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nMONOLAR II MASTIC meets NFPA 90A and 90B 25/50 requirements.
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