These durable firestop bags function through a unique three phase reaction to intumence and seal out fire, smoke and toxic gasses. At approx. 130 şC the various componenets of the bags start gluing up and sticking together, preventing the fillers from running out, even if the wraps is damaged by mechanical impact.
At approx. 280 şC the content begins to expand up to 45%, so that even the smallest remaining spaces between cables, trays and masonry are tightly closed.
At approx. 800 şC a "ceramic reaction" causes the content to harden into a solid block. The seal becomes mechanically so strong that it will withstand mechanical damage cause by falling debris etc. or a hose stream from fire fighters.

sealbag8.jpg (42071 bytes) Š

The technical difference between expanding and intumescent pillows are considerable. The latest types are often founded on a less advanced construction where lose wool have been packed in bag which surface only swelling. When mineral wool in general loses mass during a fire will also this bags stability deteriorate. Intumescent pillows has therefore big difficulties to pass mechanical integrity test after a fire test (such as UL Hose Stream). Described expansion technology for KBS SEALBAG™ is protected and offers our customer more security.