Catalog > Tools and Production Equipment > Soldering Tools and Accessories > Soldering Accessories Solder Bar 1Kg 63/37 1Kg 63/37 Solder Bar SOLDER BAR 1KG SOLDER BAR 1KG 63/37 Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Overview Alpha Vaculoy 63/37 Solder Wave solder metal is manufactured using high purity raw materials and then alloyed together. Alpha’s Vaculoy proprietry processes which removes all the oxide inclusions creating better performance through increased fluidity, better drainage and joint formation. Lower viscosity gives you great hole fill and top side fillet formation.