This is our firmest Urethane in our product range. ISI-PACK HARD, Shore-60, is mainly used as a support for hoof problems, such as cases of laminitis and also for less shock-absorbing. This product is especially for horses which need a heavy weight filling to help them to improve their gates. The ISI-PACK HARD Urethane should be used in combination with a ISI-PACK pad and net. Set time is 2 minutes, which can vary due to different conditions (weather conditions & humidity).