https://www.kappalloy.com/kapptec-1-16-x-1-2-lb-spool/
KappTec 1/16" X 1/2 LB SPOOL | Kapp Alloy
KappTec 1/16" X 1/2 LB SPOOL An all-purpose Cadmium-Silver solder that is high temp, high strength and works on all solderable materials except aluminum.
xlbspoolkappalloy