Johnson's E-127 Flux-'N-Solder with Pure Tin is the ideal blend of mild chlorides in paste form, mixed with pure tin powder to create a versatile tinning compound. E-127 is widely used by service shops for pre-tinning cast iron bearing shells, prior to babbitting. It is also used in the restoration of antique cars before adding body solder, and for pretinning parts to be later assembled and then soldered with a non-corrosive flux. Johnson's E-127 has a melting temperature of 450 ° F and is compatible with all solders. Its residues are water soluble and should be removed after soldering.