Hi everybody,

I have all the time problems to get a perfect sealed vacuum bag. I think there was only one perfect bag in the last two months...

Now I am thinking about switching to an envelope bag in a pretty big size. I thought of backing the mould with breather to prevent little holes depending on the few sharp pieces on the backside. It also could be that the mould itself is not airtight because I had a crack to repair but I sprayed some layers of board sealer on the whole surface so it should be fine.

Anyone with experience on this or tips?

H everyone. Just joined and love the format here. I have specialized in reusable vacuum membranes since 2010 and now run my company supplying all the needs for those wishing to explore this new technology. Alan Harper Composites Ltd.
Maybe you can help me ? 
CALL FOR COMMENT..... I have been asked by Elsevier scientific publisher to submit another article on Reusable Vacuum Membranes. Apparently, our previous article has been their highest download so they are after more. Can any of you assist this new article content by sharing your views or experience about reusable vacuum membranes? Any submissions will only be quoted with your permission. Please, good or bad comment acceptable as long as truthful!. Alan