Why does duct tape stick so well?
Show answer & explanation
Answer: It uses pressure-sensitive adhesive
Tape has microscopic suction cups — Wrong. Duct tape doesn't use physical suction. It sticks through pressure-sensitive adhesive—a rubbery material that bonds when pressed.
Chemical reaction bonds surfaces — Wrong. Duct tape doesn't chemically bond to surfaces. The adhesive creates physical bonds (Van der Waals forces) that can be peeled off, unlike chemical epoxies.
It uses pressure-sensitive adhesive ✓ — Correct! Duct tape uses pressure-sensitive adhesive (PSA)—a tacky rubber-based compound. When pressed, PSA flows into microscopic surface irregularities and forms Van der Waals forces with the surface. The cloth backing provides strength to resist tearing. It's physics + material science!