American Hydrotech, Inc., based in Chicago, manufactures waterproofing membranes and roof assembly systems for commercial and institutional buildings. The company's Monolithic Membrane 6125, a hot fluid-applied rubberized asphalt membrane developed in the early 1960s, has been used on horizontal and

Tremco Barrier Solutions, based in Maineville, Ohio, manufactures sealants, air barriers, waterproofing membranes, traffic coatings, and glazing system components for construction and building restoration. The company serves architects, contractors, builders, distributors, and owners across resident