United States Gypsum Co 300 Markley St Port Reading, NJ 07064 Phone : (732) 636-7900 United States Gypsum Co Business Category Gypsum Products Adhesives & sealants Pipe Jointing Compounds United States Gypsum Company Durabond Div--port Reading Plant 300 Markley St Port Reading, NJ 07064 Phone : (732) 636-7900 Business Category Building Materials