Question on Mould Release Agents
December 8th, 2009 | 
Author: Question:
Hi. I have recently purchased a business making concrete statues with latex moulds. I have ran out of mould release agent and not sure exactly what it was we were given with the business and the previous owners couldn’t remember where they got it from either. Do you guys sell any mould release suitable for this purpose? Your help will be greatly appreciated.
Cheers,
Valued Costumer
Answer:
Hi,
Light grade machine oil is the most effective release. However the plastic and rubber manufacturers warn us that continued use of a petroleum based product causes a breakdown over time of the plastics and rubbers used in the concrete industry. For this reason we recommend that a vegetable oil be used. Industrial castor oil is best but peanut, canola or other oils work quite well too.
The thinner the viscosity of the oil the better as heavy oils seem to retain air and yield air bubbles on the surface of the concrete. Wipe the mould out with a T- shirt type of material to leave only a thin film of oil in the mould. Excess oil clinging to the surface of the concrete after curing makes painting or antiquing almost impossible.
More information is available on our concrete mould website www.moulds4concrete.com.au
Kind regards
Aldax Moulds
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