Ceresit CT 83 mortar is designed to apply EPS-boards within Ceresit ETICS (External Thermal Insulation Composite Systems) with a light-wet method Ceresit Ceretherm. CT 83 mortar is used for applying to the newly erected objects as well as the buildings to be thermo renovated. The applied boards require additional fixing by means of mechanical anchors, i.e. proper expansion pins made of plastic. Ceresit CT 85 or CT 87 mortar should be used to apply fibre glass armoured layer on the EPS-boards. In case of the walls insulation with façade mineral wool boards, Ceresit CT 190, CT 180 or CT 87 mortar should be used.