Thread compound which is normally applied using a brush is called what?

The term used for a thread compound that is typically applied using a brush is recognized as "pipe dope." This substance is designed to seal and lubricate threaded joints in piping systems, enhancing the integrity and preventing leaks. Pipe dope is usually a paste-like compound that can effectively fill in the microscopic gaps and imperfections in thread surfaces, ensuring a tight seal.

The application method through a brush allows for even distribution, which ensures that the compound adheres well to the threads and fills any necessary spaces without creating excessive buildup. This is essential in maintaining the reliability of the joint under varying pressures and temperatures.

In contrast, plumbing putty is primarily used for sealing joints in plumbing fittings but does not serve as an effective thread sealant. PFTE tape, while also used as a sealing mechanism on threads, is a tape rather than a compound and is applied differently. Pipe chalk acts as a marking tool rather than a sealing agent, used to mark pipe locations and dimensions. Each of these materials has its unique purpose, but for sealing threaded connections effectively, pipe dope is the appropriate choice.