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Tim S Tim S is offline
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Default waterproofing timber formwork for complicated concrete shape

coughed up some electrons that declared:


Sound like you're overdoing it. Commercially, a mould release agent is
used. A light smear of engine oil will do the job though.

Check out
www.screwfix.com for builders metalwork.

One of my (American) concreter's books suggest spraying on a mix of diesel
and sump oil. Not that I'm suggesting the OP do that, of course not...

Cheers

Tim