K-FLEX DUCT™ LINER GRAY S2S 1 X 48 X 50' K-FLEX DUCT® LINER GRAY INSULATION IS AN ENVIRONMENTALLY FRIENDLY CFC AND HCFC-FREE CLOSED-CELL FLEXIBLE ELASTOMERIC THERMAL AND ACOUSTICAL INSULATION. K-FLEX DUCT® LINER GRAY IS USED TO RETARD HEAT GAIN AND PREVENT CONDENSATION OR FROST FORMATION ON COLD EQUIPMENT OR DUCTS. IT ALSO EFFECTIVELY RETARDS HEAT LOSS WHEN USED ON HOT EQUIPMENT OR DUCTS. LINER CAN BE USED AS BOTH DUCT AND AIR HANDLING EQUIPMENT LINER. THICKNESS HAS BEEN CALCULATED TO CONTROL CONDENSATION ON COLD SURFACES. THE CLOSED-CELL STRUCTURE AND UNIQUE FORMULATION OF K-FLEX DUCT® LINER GRAY EFFECTIVELY RETARDS THE FLOW OF MOISTURE VAPOR AND IS CONSIDERED A LOW TRANSMITTANCE VAPOR RETARDER. FOR MOST APPLICATIONS K-FLEX DUCT® LINER GRAY NEEDS NO ADDITIONAL PROTECTION. SPECIFICATION COMPLIANCE ASTM C534 TYPE 2 (SHEET) GRADE 1 ASTM D1056-00-2C1 ASTM C423/E795 NRC0.50 AT 1 THICKNESS NEW YORK CITY MEA 186-86-M VOL. IV USDA REQUIREMENTS. FLAMMABILITY UL 94-5V FLAMMABILITY CLASSIFICATION (RECOGNITION NO. E300774) ASTM E 84 FOAM CORE 25/50 AT 2 AND BELOW; PSA 0/10. MEETS REQUIREMENTS OF NFPA 90A SECT. 2.3.3 FOR SUPPLEMENTARY MATERIALS FOR AIR DISTRIBUTION SYSTEMS UP TO 1 THICKNESS. MEETS REQUIREMENTS OF UL 181 SECTIONS 11.0 AND 16.0 (MOLD GROWTH/AIR EROSION). MEETS REQUIREMENTS OF ASTM C411 (TEST METHOD FOR HOT SURFACE PERFORMANCE OF HIGH TEMPERATURE THERMAL INSULATION) SOLD IN PACKAGE QUANTITY OF 1 PRICED EACH.
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