What is oakum?

Oakum is a material made from old ropes that have been unraveled and then tarred. It is commonly used in shipbuilding and plumbing to seal joints between planks of wood or to pack gaps in pipes. Oakum is known for its water-resistant properties, making it ideal for sealing and waterproofing applications. It has been used for centuries in marine and industrial applications. Today, synthetic alternatives to traditional oakum are also available.