Cast-Crete Corp. | Seffner, FL

Cast-Crete Corp. | Seffner, FL –┬áThe nation’s largest producer of precast and prestressed concrete U-lintels claims to be the product’s pioneer. Cast-Crete also specializes in precast sills, heavy-duty parking bumpers, and thresholds. It’s come a long way from its humble beginnings in 1955 when five employees produced precast sills on a 50×100-foot lot, and delivered their product on a trailer pulled by a station wagon.