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In the event of fire Palusol® foams up very early at 100°C and forms a non-combustible, pressure-resistant and finely structured heat-insulating protective layer.

Palusol® fire protection sheets protect through their silicate technology and are classified as a non-combustible building material. The water contained in the silicate sheets begins to evaporate at 100°C, causing foaming in the core layer. At the same time, the evaporation process consumes heat energy from the fire, resulting in an additional cooling effect.

Due to the glass fiber structure of the foam body, the foaming process is controlled, and high inflation pressure generated. This effectively pushes away cover layers such as wood laminates, creating a non-combustible, pressure-resistant foam. This insulating layer prevents fire and smoke from spreading to other rooms by selectively filling joints and gaps primarily in the direction of thickness in the immediate vicinity.

Advantages of Palusol®

Start of Reaction

Very low response temperature of 100°C with simultaneous cooling effect

Inflating Pressure

Development of a significant inflating pressure of up to 1.6 N/mm²

Fire Resistance

High fire resistance times of up to 120 minutes


  • High fire resistance in combination with smoke, sound and/or heat protection even in critical edge zones of building components
  • Heat consumption by evaporating water causes a lasting cooling effect
  • Low response temperature and short reaction time
  • Certification of products and components ensures high-quality standards
    • ASTM (American Society for Testing and Materials)
    • UL (Underwriters Laboratories)
    • NFPA (National Fire Protection Association)
    • CAN/ULC (Standards Council of Canada)
    • BS (British Standards)
    • Intertek Testing Services
    • Quality Auditing Institute
    • Guardian

Application of Palusol®

Palusol® is widely used in almost all areas of passive fire protection, such as fire doors, penetration seals and safety cabinets.

Palusol® is used in fire doors and glazing as well as in penetration sealing of pipes, electrical cables and ventilation elements. In addition, there are several other uses for Palusol® fire protection sheets in special applications such as transportation. In each case, these result from efforts to develop functionally appropriate designs which effectively prevent or limit the spread of fire and smoke.

Palusol® properties

Innovative protection through silicate technology

  • Low on-set temperature at 100 °C
  • Heat consumption by evaporating water causes an additional cooling effect
  • Development of high inflation pressure of up to 1.60 N /mm²
  • Pressure-resistant, thermally insulating foam body, which foams up to 9.5 times of its original volume
  • Provides fire, smoke and fire-resistance of up to 120 minutes in building components
  • Classification of Palusol® as "non-combustible" according to building material class A2-s1,d0 in line with EN 13501-1
  • Use of natural and almost unlimited raw materials (silicate)
  • Durability tests on 40-year-old Palusol® fire protection sheets confirmed an unchanged property profile
  • Maintenance of the high-quality standard through regular in-house and external monitoring
  • In contrast to many other intumescent building materials, the carbonization gases released in the event of fire are classified as non-toxic.
  • Continuous expansion of fire protection know-how through value-creating cooperation with customers and fire protection experts

Palusol® product range

Palusol® is available in various thicknesses and dimensions. As sheet or also processed into strips, it can be used as a versatile building material in various fire protection applications.


Length (mm)2100/2150
Width (mm)1100
Thickness* (mm)1,9
Weight/sheet* (kg)6,9
Sheets (pcs.)100
Chemical basisSilicate



Length (mm)2100
Width (mm)1100
Thickness* (mm)3,6
Weight/sheet* (kg)13,9
Sheets (pcs.)50
Chemical basisSilicate



Length (mm)2100
Width (mm)1030
Thickness* (mm)3,9
Weight/sheet* (kg)10,0
Sheets (pcs.)50
Chemical basisSilicate and graphite


* mean values
Colors may differ from the illustration