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MG Chemicals Sn99 Lead-Free solder is an electronic grade solder wire. It uses a high-purity, eutectic Sn99.3/Cu0.7 alloy, which is complemented with a no clean, synthetically refined, splatter-proof resin flux core. This solder meets J-STD-004 and exceeds J-STD-006 specifications. It is a great lead-free alternative to leaded solders. It is a suitable, less costly replacement for SAC305. It leaves a small amount of post-soldering residues that is non-conductive and non-corrosive and won’t cause electrical shorts. The name no clean refers to the fact that the flux residues are not harmful to assemblies and does not mean there will be no residues.


Catalog Number Size Diameter Gauge Flux Core % Description
4901-112G 1/4 lb (113 g) 0.032" 21 2.2 Pack of 25
4901-227G 1/2 lb (227 g) 0.032" 21 2.2 Pack of 3
4901-454G 1 lb (454 g) 0.032" 21 2.2 Spool
4901-2LB 2 lb (907 g) 0.032" 21 2.2 Bar

* Also available in flux core percentages: 2% to 4%


  • Lead Free
  • Eutectic
  • Halide free
  • The resin spreads like rosin activated flux
  • No clean flux
  • Virtually non-splattering
  • Hard non-conductive residues
  • Exceeds J-STD-004B and J-STD-006C standards
  • RoHS compliant
  • Available Flux Core percentage: 2% to 4%
  • Melting Point: 227 °C - 440 °F
  • Suitable for Use in Food Facilities as a Non-Food Chemical - Canadian and NFS recognition letters available on request