For filling joints between fermacell Gypsum Fibreboards fermacell Joint Filler is a synthetic-resin modified, gypsum-based joint filler for the manual filling of joints with or without joint tape. The specially developed formulation allows extremely high joint tensile strengths to be achieved. The joint filler complies with the requirements of DIN EN 13963 and is suitable for filling and smoothing over the joints of Gypsum Fibreboards according to EN 520. Properties Maximum strengths – Rapid development of strength on account of the special fermacell formulation Good filling ability – No slumping after application and low drying shrinkage Easy to apply – Easy application to joints Versatility – Meets the requirements of EN 13963 Low emissions – Tested by the Eco-Institute in Cologne