madala sulamistemperatruuriga vismuti, plii ja tina (vahel ka elavhõbe ja indium) jootmissulam, mille sulamistemperatuur on alla 183 oC (tinapliijoodiste eutektikumi sulamistemperatuur) (vt kergsulav metall; vrd kesksulav sulam, kõrgsulav sulam), an alloy of bismuth, lead and tin (and sometimes cadmium and mercury) which melt in the temperature is below 183 oC (the melting point of tin-lead solders) (see: low-melting metal; compare: medium-melting-point alloy, refractory alloy)