INSBLOK®-19 is a mineral wool block insulation product from HarbisonWalker International that provides high strength, low thermal conductivity, good moisture resistance, and excellent work-ability. It is rated at 1,900 degrees F. It's organic binder gives it excellent cold strength but it will dissipate above 475 degrees F. It meets ASTM C612 Class 5 specifications. These boards are principally used as a backup lining to lower furnace shell temperatures. Measures 1" x 12" x 36". An order includes 16 sheets per carton. Call for more information.
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