PEG’s can be used as mould release agents in the rubber industry. A solution of PEG 4000 can be coated or sprayed into the hot mould cavities thus enabling the solvent to evaporate, the solution is either dined by applying heat or allowed to dry by evaporation at room temperature. While processing latex into cellular rubber such as upholstery mattresses, pillows etc. PEG 4000 used as mould release agent, yielding a solid wax film after evaporation of solvent. Glycols are also useful as components of coagulating baths.