In developing medical-grade silicone prototypes, there are certain medical-grade products (RTV or two-part elastomers) that will not fully cure in molds made from medical-grade rapid-prototype material (light-cured resin), even with moderately elevated temperatures. It appears that there is lower inhibition resistance in medical-grade silicone (e.g., Dow MDX-4210). Any suggestions for improved inhibition resistance in medical-grade silicone? @ Ask The Experts

Silicone Fabrication Q&A

In developing medical-grade silicone prototypes, there are certain medical-grade products (RTV or two-part elastomers) that will not fully cure in molds made from medical-grade rapid-prototype material (light-cured resin), even with moderately elevated temperatures. It appears that there is lower inhibition resistance in medical-grade silicone (e.g., Dow MDX-4210). Any suggestions for improved inhibition resistance in medical-grade silicone?

Answered September 14th, 2010 by Expert: Brian Higgins

Some things to make sure you are doing that can affect curing:
- Mixing A and B properly and equally per manufacturer’s specification.
- Not poisoning the material by allowing it to contact IPA or other chemicals in the process.
- Making sure to use the material at room temperature in a moderately humid environment.
Brian Higgins

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