Good afternoon technical team, My project is to cast silicon bungs with two tube holes running through. One 4mm & one 8mm.

I have been sucessful on two trials and I wish to improve my methods. I have a workshop at my disposal and have created aluminium moulds

and a vacuum degassing chamber. I am however new to the business and require some guidence.

(1) What temperature should I store the silicon rubber?

(2) I find it difficult to decant the silicon from one vessel to the moulds. Is there a method to make it more runny?

(3) What is the ideal method to degas the mixture. Should I keep stirring the mixture and degas again?

You will see from the photo that the left hand bung contains air and the right hand bung does not.

Thank you , I welcome your idea's................Mick Dixon

We are already using your products