Westlake Chemical Closes Purchase of CertainTeed's PVC Pipe, Fittings and Foundations Business
HOUSTON , May 1, 2013 /PRNewswire/ -- Westlake Chemical Corporation (NYSE:WLK) announced today that all closing conditions, including regulatory review, have been met and it has closed the previously announced acquisition of CertainTeed Corporation 's Pipe and Foundation Group (PFG) business