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Fitherm GB

Fitherm GB

Product Description

Fitherm® GB is a high-performance intumescent material based on expandable graphite. In case of fire Fitherm® GB can expand to multiple times its original volume and forms a heat-isolating shield. Fitherm® GB expands in all directions to fill gaps and cavities and builds a very effective barrier against fire and smoke. The water-resistant property enables it for use in areas with high humidity. Fitherm® GB is a good choice for an intumescent material with proper performance at a very attractive price.

Fitherm® GB strips can be laminated with a PVC foil in different colors, with a fiber glass layer or other materials, on the other side optional with a high quality self-adhesive for easy installation and durable fixing.

approx. 1.25 g/cmto 1.3 g/cm3

Expansion temperature
starting from 200°C

Expansion factor
up to 15-fold its original thickness

Expansion pressure
startapprox. 0.5 N/mm²


Fitherm GB is developed for a wide range of applications where an intumescent material is necessary to maintain the system integrity and insulation in case of fire. These systems are for example;

  • fire doors and shutters

  • partition walls

  • glazing elements, ceilings and floors

  • fire safes and document cabinets

  • air grilles and dampers

  • pipe penetrations and cable transit systems

Fitherm GB works well in areas with high humidity and possible exposure to water.

Fitherm GB can be stored under normal room conditions without special care. During handling and processing the wearing of protective gloves is recommended.

Fitherm GB is available as flexible rolls in the following standard dimensions, other measures on request:
Thickness: minimal 0.55 mm, 1 mm, 1.5 mm or 2 mm;
Width: 10 mm, 15 mm and 20 mm;
Length: 25 meter with or without self-adhesive backing.

Lamination with PVC foil in different colors or fiber glass cloth is possible. Encapsulation into uPVC in different colors is available in a width of 10, 15, 20, 25, 30, 40 and 60 mm.