Used primarily as an antiozonant in rubber products, especially in tires, to protect against ozone degradation. It prevents cracking and extends the service life of rubber exposed to outdoor conditions. Commonly found in sidewalls of tires, hoses, belts, and other dynamic rubber goods where flexibility and durability are critical. Also provides some antioxidant properties, enhancing resistance to heat and aging. Effective at low concentrations and compatible with various elastomers, including natural rubber and styrene-butadiene rubber.