Silicone rubber molding and resin casting is NOT injection molding.
Using resin casting to duplicate injection molded parts is often an exercise frustration and futility.
It's far better to design objects for the resin casting process than to try to duplicate existing parts.
Here is a list of suppliers for the rubber, resins and waxes I use in my videos:
https://www.dropbox.com/s/kz6mhmf7v5vpy7l/Material%20and%20Suppliers.pdf?dl=0
Do you have a project to suggest for the channel?
Here’s a .pdf with everything you need to know:
https://www.dropbox.com/s/pjb0l6fr7zjttec/YouTube%20Collaboration.pdf?dl=0