The company that owns the product is called Pathway Polymeres. This is the third company to own it since I have been using it. I get mine from a local pottery store here in Seattle. A two gallon kit is about $150. I just checked thier website a they do have a good instruction PDF. Back when I started using 2020 there was no information other than mix them together. With each new ownership the directions got better. I wish I had these instructions back then. Oh, it's under products-Por-a-mold then scroll down to data sheet.I have downloaded two PDF's from the 2020 site. Too big to place here.
If you want them, PM me and provide email.