Here’s a quick quide to making brush on molds with 74-30 urethane rubber. 7430 is a great general purpose rubber that is great for casting plaster, wax, or Gel-10 silicone. You can thicken 74-30 rubber with Cab-o-sil or PolyFiber for brush-on mold applications.
These molds were made over TexClay positives. Texclay is a meltable clay that may be poured directly into alginate to produce a sculptable positive.
Post time: Jun-27-2017