Direct answer: Finnish wood tar is traditional tar made from Finnish forest materials, especially resin-rich pine, and known in Finnish culture as terva.
Finland has a deep tar-making tradition connected with pine forests, rural kilns, and export trade. Like other northern wood tars, Finnish tar was made by slow heating wood in controlled low-oxygen conditions so that tar could drain out rather than the wood simply burning.
Finnish wood tar is associated with boats, log structures, skis, outdoor wood, ropes, and cultural products that use the smell and symbolism of tar. It also appears in heritage tourism and traditional craft contexts.
Finnish wood tar is not chemically separate from the wider wood-tar family, but the phrase matters culturally and geographically. In practice, most traditional examples are pine-based, although exact products should still be checked by label.
In short: Known in Finnish as terva. Usually associated with pine wood tar. Made through controlled heating of wood. Linked with Nordic boat, timber, and craft traditions.