noun
tar pitch
A thick, dark, sticky substance obtained from the distillation of coal tar or petroleum, used in industrial applications such as roofing, paving, and waterproofing.
屋根の防水にタールピッチが使われている。
Tar pitch is used for waterproofing the roof.
ピッチ can mean 'pitch' in various contexts (e.g., baseball, music), but タールピッチ is specifically the industrial material.
Variant spelling with a middle dot; less common but still seen.
Loanword from English 'tar pitch'.