Soldering and brazing metals and alloys in this class including solders comprised mainly of lead and tin; pastes containing metal powder for use in copper brazing

Chemicals products, excluding enzyme preparations used in industry; tempering and soldering preparations including chemical preparations for soldering, solder fluxes, soldering injection oils to reduce oxide formation on bridge construction lines, surface conditioners to prepare surfaces for soldering, protective coatings to maintain solderability of surfaces and solvent and aqueous cleaners to remove residues and containments before and after soldering