With polyurethane resin you can use the silicone mold about 30- 35 times
We are making our parts in resin check this out: [www.youtube.com]
It is not very hard to do. I will post more videos on how to make silicone molds.
Our printers work very well with polyurethane resin pieces.They do not melt like PLA parts do and are much easy to be reproduced then cnc parts.
We played with universal silicone to : [www.youtube.com]
If you want to see more of our experience with molds subscribe to our youtube channel because we will post more videos in the near future.