Rubber physical-property and laboratory testing knowledge, including experience interpreting results for properties such as tensile strength, elongation, hardness/durometer, abrasion, aging, oil resistance, heat resistance, cure characteristics, and adhesion. A Safety-Sensitive Function, as defined by the Company, is one that requires the operation of motor vehicles, forklifts, or motorized warehouse equipment, or one that involves inspecting, servicing, conditioning, controlling, supervising, and loading or unloading such machinery.