fireproof seal

Intumescent graphite fire resistant door seal strip

Intumescent graphite fire resistant door seal strips are specially designed sealing strips that are used to seal the gaps around doors to prevent the spread of fire and smoke. These door seals are made from a combination of intumescent materials and graphite, which expand when exposed to heat, creating a barrier that seals the gaps and prevents the passage of flames and smoke.

The intumescent materials in the strip are typically made from a mixture of fire-retardant chemicals and expandable graphite. When the temperature rises during a fire, the intumescent materials react and expand, filling the gaps around the door. This expansion creates a tight seal that helps to prevent the passage of heat, flames, and smoke to other areas of the building.

Graphite is added to the seal strip to enhance its fire resistance properties. Graphite is a naturally occurring mineral with excellent thermal conductivity and resistance to high temperatures. It acts as a heat sink, absorbing and dissipating the heat from the fire, which helps to further delay the spread of flames.