Review on SRA Rosin Paste Flux 135: Unbeatable Flux for Optimal Soldering Performance by Duane Kerr

This was just what I needed for soldering. I used this flux with Alpha Fry AT-31604 60-40 Rosin Core Solder and it worked great! I'm very happy with how he pulled the solder into the new battery wire ends I fitted for the old car. I wrapped some shrink wrap around the cable before soldering the ends, then closed the connection and shrunk the shrink wrap for a perfect fit. This permanently prevents corrosion.