solder

This term describes both the material used for bonding and the process of applying it. It carries a technical connotation associated with electronics, plumbing, and jewelry making, implying a permanent or semi-permanent mechanical bond created through heat. As a noun, the word is uncountable. It refers to the alloy substance itself rather than individual units of the material, meaning it cannot be pluralized and requires a partitive like "a bead of" or "a spool of" when referring to a specific quantity.