Posts Tagged ‘urethane molds’

Urethane Rubber Mold for Plaster or Concrete Casting

April 17, 2017

Our 75 Shore A Urethane Rubber is a pourable material great for making molds that stand up well to repeated castings of cement, concrete, Hydrocal, plaster and other gritty and/or abrasive materials. It is a 1:1 by volume mix ratio, so no scale is needed. ¬†For this project, I will be making a one piece […]

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