birch bark tar

Science-notes---Ringlemere-

Science Notes – Early medieval insights from birch bark tar

Birch bark tar (manufactured by the heating of bark in airtight conditions) has long been prized for its sticky, water resistant, and biocidal properties. Throughout human history it has seen a wide range of uses, including as a sealant (for example, in waterprooing vessels), an adhesive (for hafting weapons, repairing ceramics, or assembling composite objects like jewellery), and in perfume and medicine.