Extol of Ohio Inc., the leader in fabricated insulation systems. Products include Polyisocyanurate, Cellular Glass, Extruded Polystyrene (XPS), Phenolic Foam, Mineral Wool shaped to fit mechanical pipe and equipment, fittings, valves and vessels. A complete line of weather and vapor barrier jackets, coatings, adhesives, sealants and other accessories are provided. Specification and design assistance.