Vacuum Chambers For Vacuuming Liquid Rubbers and Liquid Plastics Vacuum systems (vacuum chamber and vacuum pump that pulls 29 inches of mercury) are used to remove the air from high viscosity materials like silicone rubber before pouring. They are also ideal for vacuum degassing liquid plastics (such as Crystal Clear® plastic) for making bubble free castings.  Easy to read gauge let's you know if your vacuum pump is pulling the required 29" of mercury. Vacuum pump not included.

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• Why are there bubbles on the surface of my rubber mold?
• Do I have to vacuum de gas the silicone rubber? Is vacuuming the rubber that important?
• Is there a way around investing in a vacuum pump and vacuum chamber?
• I recently obtained a vacuum chamber and pump to get the air out of my silicone rubber. When I vacuum the material (after mixing Parts A + B), my silicone takes forever to de-air and I still end up with some bubbles in my silicone rubber. Is this normal?
• How can I avoid bubbles in my casting?

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