Exterior insulation and finish systems (EIFS) are used on walls with insufficient thermal insulation. A distinction is made between purely mineral high-build systems, low-build systems with silicate-emulsion-bound surface materials and cement-free, polymer-emulsion-bound systems. Since their surface temperature drops slightly below that of the air, EIFS tend to collect condensation on the surface. This can take up to 15 hours to dry on facades facing north and north-west.

For this reason, EIFS are susceptible to algae and mold formation. Sometimes they are also subject to system-related cracks or mechanical damage which permit water ingress. To ensure long-lasting effectiveness of the EIFS, repair work must be thorough and of a suitable nature. The special properties of solvent-free silicone resin primers and silicon resin emulsion paints make them ideal for all EIFS – including systems with Styrofoam, which is attacked by solvents.