Ceresit CT 87 mortar is designed to warm up external walls of the buildings by application of external thermal insulation composite system using EPS- or mineral wool façade boards. It is an element of following ETICS from Ceresit: Ceresit Ceretherm Premium or Ceresit Ceretherm Wool Premium and Ceresit Ceretherm Express. CT 87 mortar is used for fixing of EPS- or mineral wool façade boards and for applying the reinforcing protection layer to insulate the newly constructed objects as well as older buildings to be thermo-renovated. CT 87 is additionally reinforced with fibres, therefore it is more resistant to the formation of cracks and hairlines.