Pureflow high purity solder bar pureflow gmc096 p the pureflow p 63 37 solder bar 500g is a high purity solder bar ideal for electronic applications that incorporates the following features sn63pb37 material 183 deg c melting point very low impurities fully molten at 183 deg c and 63 37 tin lead composition p pureflow gmc096 p 63 37 solder bar 500g