1. kõvade materjalide tehnoloogias materjal, mis seob materjali teised faasid tervikuks, nt metallsideaine keraamilis-metalsetes komposiitides – kermistes (vt kermis); 2. pressiste tugevust suurendav, tavaliselt polümeerne aine, mis eelpaagutamisel eemaldatakse (vrd metallsideaine), 1. in hard materials a cementing medium i.e a material (usually of low melting point) added to powder mixture for the specific purpose of cementing together powder particles that alone would not sinter into a strong body (see: cermet); 2. material added to the powder to increase the green strength of the compact, which is expelled during sintering (compare: binder metal)