It’s called “duck tape” because the original material was a cloth tape made from cotton duck fabric, and early WWII users nicknamed the waterproof ammunition‑box tape “duck tape,” which later evolved into the more familiar “duct tape” name when people started using it on air ducts.

Quick Scoop

  • The word duck comes from Dutch “doek,” meaning a strong linen or canvas cloth, which is what the original tape backing was made from.
  • During World War II, Johnson & Johnson’s Permacel division made a waterproof, cloth‑backed tape for sealing ammunition boxes, and soldiers informally called it “duck tape.”
  • After the war, the same style of tape was used on heating and cooling ducts, and the name “duct tape” caught on in construction and home use.
  • In the 1970s, the company Manco trademarked Duck Tape as a brand name, leaning into the old nickname and the common mispronunciation.

In short, “duck tape” started with duck cloth and a water‑repellent wartime tape, and “duct tape” became the later, home‑repair name—today both phrases are widely used and often mean the same thing.

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