Oakum
Oakum can be used to seal cast iron pipe drains. After setting the pipes together, workers pack oakum into the joints, then pour molten lead into the joint to create a permanent seal. The oakum swells and seals the joint, the "tar" in the oakum prevents rot, and the lead keeps the joint physically tight.
Today, modern methods, such as rubber seals (for example, gaskets or o-rings) are more common.
William Champion (metallurgist)
Because of the American War of Independence, the price of tar greatly increased, which was used at the time as a sealant on ships. On 29 April 1780 an advert appeared in Sarah Farley's Journal offering for sale a process of making English tar, from the estate of the deceased William Champion. Later, a tar works was established within Bristol Harbour.