EN 998-2 identifies and defines three different types of mortar:

• General purpose masonry mortar, masonry mortar without special characteristics made of aggregates with a generally dense structure and a dry bulk density of 1300 kg/m³
• Thin layer masonry mortar, designed masonry mortar with a maximum aggregate size less than or equal to a prescribed figure and a dry bulk density mostly higher than 1300 kg/m³
• Lightweight masonry mortar, designed masonry mortar with a dry hardened density equal or less than 1300 kg/m³ with lightweight aggregates.

The majority of factory-made dry or ready-mixed mortars which – except for water in case of dry mixed mortars – require no further constituent to be added on site. However, there are also semi-finished products, which require mixing of pre-batched constituents on site.

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