ZERO's reputation for excellence and superior performance in fire and smoke protection for doors is the result of many years of leadership and innovation in developing fire and smoke seals that meet international and U.S. positive pressure code requirements. Our engineered gasketing systems and components meet the highest standards of design and life safety. And when specific applications require intumescent protection for door openings, our soft puff INTUMET™ material delivers the performance best suited for most fire and smoke doors.
ZERO's positive pressure seals are tested and listed according to U.S. listing agencies' classifications for Category G edge sealing systems and Category H smoke and draft control systems. Category G edge seals are required for use on Category B wood core doors. Category H smoke seals are required for all positive-pressure doors carrying "S" labels.
Our INTUMET material is used in OEM Category A doors to eliminate the need for add-on seals to achieve positive-pressure fire ratings. Smoke seals may still be required.