In 2016, W.R. Grace separated into two independent public companies, Grace and GCP Applied Technologies. Headquartered in Cambridge, Massachusetts, GCP Applied Technologies has over 50 years of industry expertise. Our portfolio of construction products includes concrete and cement additives, building materials and technologies. The world’s most successful architects, producers, builders and contractors insist on GCP brands and solutions for their construction projects. AR Chambers carries Bituthene, Perm-A-Barrier and other products from GCP.