Should I Use Polyurethane Mold Rubber or Silicone Mold Rubber

Should I Use Polyurethane Mold Rubber or Silicone Mold Rubber? Each option has advantages and disadvantages and there are a wide variety of options in each of the product lines themselves

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What's the Difference between Polyurethane Rubber (PU) and Silicone Rubber? - FacFox Docs

Expressions LTD Polytek Platsil 73-15 Silicone Mold Rubber

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