Used for the production of polyester resin and alkyd resins for the manufacture of paints, also for solvents in the paint industry, besides that PGI is a co-solvent for emulsion paints, in addition to controlling flexibility and hardness as well as antifreeze additive. PGI also can be used for liquid organic fertilizer because it has an anti bacterial and anti fungal function. PGI also widely used as antifreeze in oil fuel.