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TR-19HS Block is a high-strength, 1900 F (1040 C) structural insulation board material. The medium density (36 pcf), vermiculite composition product has a typical cold crushing strength of 350 psi and is resistant to direct flame exposure or cryolite vapor attack. It can be easily cast or gunned on with refractory castables as well as used with firebrick, refractory plastic or ceramic fiber linings.
