High-quality, halogen-free, lead-free solder wire for hand and automatic soldering in electronics, electrical engineering and electromechanics. The flux is characterized by high temperature resistance and does not spatter during melting. Optimum wetting as well as spreading values exceeding standards make this halogen-free solder wire a top product among lead-free tubular solders. The new flux formulation "Clear" is based on synthetic resins (free of rosin) and has been perfectly adapted to the needs of lead-free soldering technology in assembly production.