What type of mortars are designed as direct bond adhesives?

Dry set mortars are formulated specifically for direct bond applications, which makes them suitable for adhering tiles directly to the substrate without the inclusion of additional additives. These mortars are designed to create a strong bond in a thin layer, allowing tiles to be installed close to the surface without the need for a thick bed of mortar.

The composition of dry set mortars generally includes cement, sand, and certain additives that enhance performance, but they lack proprietary polymers or latex that would modify their properties. Dry set mortars are commonly used for installations where the substrate is clean and dry, and no moisture is expected to affect the bond.

Other types of mortars, such as thin-set, modified, and latex modified mortars, may include additives or polymers that enhance their adhesive properties or workability, but they are not specifically identified as direct bond adhesives in the same way that dry set mortars are. Thin-set may refer to a method of application, while modified and latex modified mortars include additional components that alter their performance characteristics.