Vulcanized rubber is the best material for hockey pucks. You can also find standard, non-vulcanized rubber, but those generally aren’t NHL regulated. Vulcanized rubber is strong enough to be placed underneath car tires so you can work on your car, be used at feet on benches and woodworking tables, and more. They’re ridiculously durable, making them ideal to withstand warping and damage from repeated use on the rink.\r