this is an experiment mold of 4 truck tires , for make it in ruber.drying up after two days, I could not wait any longer and I have opened,, the result has been surprising to me,, I'm sure still not dry at all,, so in the next, wait a little longer. The product I've used is silkaflex xD, which had at home, but better try some other type of silicone. Do not forget to put some oil in greasing the mold easy to leave once dry.