Paper Carton Sealing tape also known as Water Activated tape (WAT) bonds instantly to all corrugated carton surfaces and generates an immediate tamper-evident bond. Water activated tapes (WAT) come in reinforced and non-reinforced versions. Reinforced contains strong fiberglass yarns are strategically bonded between sheets of paper to provide an extra margin of strength. Non-reinforced WAT tape does not contain fiberglass fibers.