McCormick Insulation Supply is a wholesale distributor of insulation materials and accessories. The company has thirteen stores around the Maryland area, including in Hyattsville. The company offers its commercial and industrial clients a range of supplies and materials, including pipe insulation, rigid and flexible duct insulation, cold system insulation and steam and boiler insulation. McCormick’s merchandise includes fiberglass coverings, hull boards, duct liner, protective clothing, chemicals, adhesive spray, air filters and polysheeting material.