Duct tape gets its name from its use in sealing air ducts, but its origin traces back to World War II when it was originally called “duck tape” due to its waterproof qualities and the cotton duck cloth used for its backing.

Historical Origins

• During WWII, the U.S. military needed a waterproof tape that could seal ammunition cases. The tape developed was backed with cotton “duck”—a tightly woven fabric.

• Its water resistance led to the nickname “duck tape,” comparing it to the way water rolls off a duck’s back.

Transition to “Duct Tape”

• After the war, the tape was used for connecting heating and air conditioning ducts in homes.

• With this new application, the name transitioned to “duct tape,” and it became widely used in construction, often colored grey to match ductwork.

Name Overlap and Commercialization

• Both names, “duck tape” and “duct tape,” overlap in usage today. “Duck Tape” has even become a trademarked brand that plays on this historical confusion.

• The transition in naming reflects its evolving uses: from military and waterproofing applications to heating and cooling system repairs.

In summary, duct tape was first known as “duck tape” for its fabric and water- resistant properties, but the modern name comes from its widespread use in sealing air ducts after WWII.