ZERO INTERNATIONAL
415 Concord Avenue
Bronx, New York 10455-1004
Tel: (718) 585-3230
Toll-Free: (800) 635-5335
Fax: (718) 292-2243, (800) 851-0000
Email: zero@zerointernational.com
Web site: http://www.zerointernational.com

Intumescent Fire and Smoke Seals
Positive Pressure Solutions for Doors

ZERO’s many years of leadership and innovation in developing fire and smoke seals for international and U.S. positive pressure code requirements have produced top-quality components and engineered gasketing systems that meet the highest standards of design and life safety.

ZERO’s positive pressure seals are tested and listed according to U.S. testing 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™ intumescent material is used in Category A doors to eliminate the need for add-on seals to achieve positive-pressure fire ratings. (Smoke seals may still be required.) Our proprietary intumescent technology affords virtually unlimited flexibility in meeting our OEM partners’ needs. All INTUMET materials are manufactured at our New York facility, ensuring convenient sourcing and stable pricing for our domestic customers. We welcome inquiries from manufacturers regarding either routine or specialized requirements for integrating intumescence into their Category A doors.

When standards or specific applications require intumescent protection, our SOFT PUFF™ INTUMET material delivers the performance best suited for most fire and smoke doors. Developed specifically for doors, this rubber-matrix material begins intumescing at the relatively low temperatures where organic materials begin to emit combustible and noxious gases. It expands gradually to fill all gaps with moderate force that will not unlatch the door.

See below and in the attached CAD library for examples of ZERO fire and smoke seals. And visit our website for full details of our complete line.