I have today mixed and poured my first mould. Whilst degassing small (100 gram) mixes the rubber certainly bubbled up but I did not notice any significant 'collapse' as shown on your tutorial video, even after approximately 5 minutes.

The degassing chamber negative pressure was in excess of 0.8 bar. I left the pump running and chamber outlet valve open during this period.

Any reason I did not notice a collapse and is that negative pressure ok?

Regards

Ray

Hi,

For small pots of silicone there may not be much air to come out so it may not be as dramatic.  Also the top surface area in a typical pot would be proportionately bigger for a small quantity.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant