Although they both have similar functions to level the substrate, the selection on which to use will depend on the application. Screed mortars are normally laid to receive tile and stone finishes and the mix consistency of the mortar is such that the application is normally done by hand. The mix consistency of self-levelling products are more fluid and designed to flow and achieve a more accurate level to apply vinyl adhesive and receive resilient finishes such as vinyl, carpet and engineered wood flooring.