This preparation contains two ingredients. Dimeticone is a water repellent allowing transpiration of water vapour from the skin. The benzalkonium chloride is a quaternary ammonium compound, active against bacteria & yeasts. This preparation is used to protect the skin from moisture, irritants, chafing & contamination with bacteria or yeasts. It is used in the treatment of napkin rash, in the management of incontinence & to prevent pressure sores. Can be used for: Nappy rash Sores caused by lying or sitting in the same position for long periods of time (pressure sores) Urinary rash