• All Painting Ltd.

• Boiardi Products Corporation

• Camara Slate Products

• DuPont Elastomers L.L.C.

• Envirospec, Inc.

• Envirospec, Inc.

• Garon Products Inc.

• Homasote Company

• New England Stone Industries

• Pecora Corp.

• Select Products Co.

• StreetBond, a Quest Construction Products brand

• SureSeal USA

• Transpo Industries, Inc.

• U.S.E. Hickson Products Ltd

• Vermont Structural Slate Company, Inc.

• deXstone LLC.