Mixtures of alkaline, in most cases organic salts (mixtures of different, mostly organic acids, saponified with aluminium hydroxide) of the aluminium hydroxide act as thickener. They excel in good water resistance, excellent adhesive properties, good pump ability, low oil separation and high drop point. Their worked stability is rather moderate. This type of grease is often used as food grade lubricant and multi-purpose grease in the steel industry.