I want to open vac bag a mould as opposed to enclosing the the whole mould in a bag. Unfortunatly the mould is a 3 piece mould and therefore would leak through the flanges. Can anyone tell me an easy and cheap way of overcomming these problems either in the making of the mould stages or once the mould has been made
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O-ring or add oil base clay to the flanges to seal upon tightening?