The Dow Chemical Company, Midland, Mich., has agreed to purchase the assets of Celotex Corp.’s rigid foam insulation business. The purchase includes all Celotex brand polyisocyanurate insulation products for residential and commercial markets, as well as other accessory products. The new business will be integrated into Dow’s North American Building Materials Divison.

The transaction includes the sale of five manufacturing facilities located in Charleston, Ill.; Elizabethtown, Ken.; Pennsauken, N.J.; Texarkana, Ark. and Tracy, Calif.; as well as Celotex product brands: Tuff-R, Super Tuff-R, Sturdy-R and Thermax insulating sheathing; Hy-therm Nail Line Roof Insulation; Celo-Vent Insulated Shingle Deck; and Tuff-Wrap Air Infiltration Barrier. The Celotex name will remain with the Celotex Corp.

“Adding a full line of high performance, polyisocyanurate foam insulation products to our existing line of STYROFOAM brand insulation extruded polystyrene products allows us to offer homebuilders, architects, specifiers, building owners and consumers a more robust product offering to meet diverse residential and commercial building needs,” said John Somerville, commercial director, North American Building Materials, Fabricated Products, The Dow Chemical Co.