IIG: Industrial Insulation Group, LLC - A Calsilite/Johns Manville Joint Venture The Industrial Insulation Group (IIG) family of products includes calcium silicate, perlite, mineral wool, fireproofing block, and related accessories for high temperature, fireproofing and commercial applications. In addition to manufacturing the premiere line of insulation products, we are committed to safety; this pervades our organization and extends to our clients, our colleagues and our industry. Calcium-silicate.com~Site InfoWhoisTrace RouteRBL Check