Q.: Our local ready mixed concrete association is interested in the use of soy bean oil as a form release agent for architectural concrete. Is soy bean form oil ever specified for this use and does anyone market soy bean form oil commercially?

A.: We have not been able to find anyone who uses soy bean oil for this purpose, though so many oils have been used as form release agents that it could well have been used on some jobs. Castor oil has been used as a form release agent for rubber form liners that might swell from use of petroleum oils.