The present invention relates to a PVC / CPVC solvent cement formulations using less toxic ketonic solvent mixtures comprising of first three members in homologous series of ketones having one low boiling ketone with boiling point less than 70°C and solvent mixture having two medium boiling ketones with boiling point around 100°C. The solvent cement formulation disclosed in the present invention is less toxic, low VOC and fast curing method of preparing said composition comprising PVC/CPVC solvent cement, which is less toxic, low VOC, fast curing and cost effective.