On June 15, 1936, Donald J. Burch decided to go into business as the Colorado Steel Sash Company. The original site was located in Denver on Cherry Creek Drive. It started out as a new window manufacturer, but it wasn't long before the need for material to glaze steel windows changed the company's course to become a sealant manufacturer. The Colorado Steel Sash Company became known throughout building trades for its integrity and product quality. These products were known as the "Sashco" brand, to which the company changed its name in 1973. Since that time, Sashco has led the way in innovation and product performance by developing high quality sealants for both conventional home construction and log home finishing and maintenance.