A Dive into Traditional Tarring Techniques

Read a short Q&A with HRT’s Restoration & Preservation Manager, Corbet Walser, who demonstrates how tarring was commonly employed across various applications throughout history, including roofing, road paving, wood protection, and, i*n this case, preserving hemp rope, particularly on boats and ships.

HRT: Can you tell us more about this process?
CW: This is used to protect rope from microbial growth and weathering. By applying a mixture of equal parts pine tar, boiled linseed oil, and turpentine, along with a small amount of Japan drier, serves as an effective solution.

HRT: What is this solution made of?
CW: Pine tar offers UV protection and natural antimicrobial properties, while boiled linseed oil aids in adhering the tar to the rope and prevents melting in high temperatures. Turpentine thins the mixture for better penetration into the fibers, and Japan drier accelerates the drying process of linseed oil.

HRT: What was this used for in the past?
CW: Tarring was commonly employed across various applications, including roofing, road paving, wood protection, and preserving hemp rope, particularly on boats and ships. The term "tar" or "Jack tar" originated from its frequent use by sailors.

HRT: How does the process work?
CW: The contraption I’ve re-created, albeit unnamed, attaches to a length of rope, with dowels guiding the rope into and out of the tar solution. Wire hooks aid in removing excess tar, allowing for reuse. Circular caps facilitate easy attachment and detachment without disassembling the mechanism.