High calcium hydrate Hydrated lime (or calcium hydroxide, or slaked lime) is usually a dry powder resulting from the controlled slaking of quicklime with water. The exothermic or released heat of reaction is captured and used to evaporate the excess slaking water. For "slurry lime" excess water is not evaporated and the hydrate remains as a water suspension Chemical formula: Ca(OH)2 Available products: Normal, slurry, or high-porosity (Spongiacal®, Wülfrasorb®) Dolomitic hydrate Dolomitic hydrate is manufactured from normal dolomitic quicklime under special hydrating conditions that control temperature and pressure. "Normal dolomitic" hydrate is made similar to high calcium and usually does not completely hydrate all the oxides; especially the magnesium oxide component. Pressure hydration of dolomitic quicklime insures that all the calcium and magnesium oxides are fully hydrated. At Chemical Lime, we commonly refer to the double hydrate dolomitic lime as "Type S" hydrate. Type S Our "Type S" hydrate refers to the double hydrated dolomitic lime. Due to it's unique chemical/physical properties, this hydrate is commonly used in building construction, especially in masonry applications. Therein, it imparts increased workability to the masonry mortar and adds increased bond strength between the mortar and masonry unit (clay brick, concrete block, clay tile, etc.) "Type S" is commonly sold in 50 pound bags but is available in truck-load or rail-car volumes.