94A is the top end, 2 part casting compound and it takes days to fully cure. (2 days for minimum retention and 6-7 days to fully cure)
I would expect whatever urethane you picked up has the instructions on it.
If it's just a one part RTV style urethane I would expect the cure time to be significantly shorter. Though by the description it sounds like a 2 part compound.
If I fathomed a guess from your description I would say the stuff you picked up is most likely in the 80A - 88A range. (That's the very high end for urethane compound) The high durometer products only come in casting compound form.
The "typical" top end urethane like window weld or high end 3M products is only 60A. Most other mixtures are softer then that even.
