Neutral cleaner to avoid chemical reaction of oil and Fat which is causing grease layer on the tank surface. While Alkaline cleaner reacts with fatty acid present in oil and fat and causing the formation of sticky greasy mass on the tank surface this is the reason why we should avoid uses of any alkaline materials for removal of vegetable, animal and mineral oils etc... HCF Neutral product based on highly efficient dissolving and low foaming nonionic surface-active agents.specialized for the removal of vegetable, animal and mineral oils as well as fats.