During World War II, rubber products were produced in the California plants and used in America's aircraft assembly. In 1949 the rubber production was moved to Charlotte where SAFE-T-CONE® products were developed and produced as well as more chemical and plumbing/hardware products. In 1958 the Douglas Tools line of augers, hole saws, hammers, levels, and measuring devices, was added. GUNK LABORATORIES was acquired in 1959, resulting in the addition of an entire line of GUNK degreasers -- including ENGINE BRITE® -- and cleaning products. The SolderSeal-Gunk logo was formed at that time.

Radiator Specialty continues to thrive and serve the automotive aftermarket, plumbing, hardware and appliance industries with quality products that make things work better.