Almit KR-19SH RMA Ag is a Lead Solder Wire with single-core flux. Low melting point makes is suitable for SMD components. Because the alloy contains silver, the solder's take-up of silver is reduced and the transverse strengtht is improved when temperature changes occur. The flux residue is transparent, chemically stable and causes no corrosion. Should be left on the board without cleaning.
KR-19SH RMH Ag is the solder wire to use if reliability is important to your product.