EN 12004 is a European standard that specifies the requirements and test methods for adhesives for ceramic tiles. It is titled "Adhesives for tiles - Requirements, evaluation of conformity, classification and designation". The standard covers both cementitious and dispersion adhesives, which are used for fixing ceramic tiles on walls and floors.

The standard specifies various performance requirements for adhesives, such as their open time, slip resistance, shear strength, and water resistance. It also outlines the testing methods that should be used to evaluate these properties. In addition, the standard provides guidelines for the classification and designation of adhesives based on their properties and recommended applications.

EN 12004 is an important standard for manufacturers, distributors, and users of ceramic tile adhesives. It helps to ensure that adhesives meet certain minimum requirements for performance and safety, and it provides a basis for comparing different products. Compliance with the standard can also be used as a basis for CE marking, which is a mandatory requirement for construction products sold in the European Union.