Pasty fibrous compositions

A method of manufacturing a pasty fibrous composition includes mixing 100 parts by weight ceramic fibres with 100 to 180 parts by weight water and then whilst continuing the mixing adding 4 to 15 parts by weight clay. An organic bonding agent is then mixed in an amount of 2 to 8 parts by weight, calculated as solid material. The composition is suitable for the manufacture of fibre plates used as expansion joint filling.