For shipments that can't afford a seal that fails, reinforced paper tape is the professional's choice. This water activated tape bonds directly into the fibers of the carton when moistened, creating a seal that becomes part of the box itself. Fiberglass yarns criss-cross between layers of kraft paper, adding extra strength that can hold up to heavy loads, rough handling, and attempts at tampering. The tape stays flexible enough to wrap cleanly over top and bottom flaps and it performs reliably in both hot and cold conditions.