Direct answer: Norway tar is an older trade name usually associated with Scandinavian pine tar, similar to the family of materials often called Stockholm tar or Swedish tar.
Northern Europe had long traditions of making tar from resinous conifer wood. Names such as Norway tar, Swedish tar, and Stockholm tar often carried trade meaning as well as geographic meaning. They told buyers that the material came from a northern pine-tar tradition.
Norway tar appears in older catalogues, maritime writing, and traditional craft contexts. It is usually connected with rope, boat timber, log structures, and outdoor wooden surfaces rather than with coal or petroleum products.
The term is less precise than pine tar. A modern buyer should look for the producer, tree source, production method, intended use, and safety data. “Norway tar” may be a historical or commercial label rather than a protected specification.
In short: Usually refers to Scandinavian pine tar. An older trade-style term rather than a universal chemical definition. Associated with boats, rope, and outdoor wood. Should be checked against the actual product label.