The problems of excessive application of form oils are:
(i) It stains the surface of hardened concrete.
(ii) Excess oils have nowhere to escape and find its way inside the cement paste and form holes subsequently. The oils bead up because of its incompatibility with water in chemical nature.
(iii) Higher cost is associated with increased usage of form oils.
(iv) In a relatively short time essentially most diesel oil evaporates so that it creates environmental problem.
