Intumescent fire seals

Based on the three intumescent technologies (sodium silicate, ammonium phosphate and graphite), ODICE offers a wide range of fire seals and fire sheets. The co-extruded fire seals enhance a good cold smoke tightness and some extra dB for the acoustical insulation.

PALUSOL® PL is an intumescent fire seal made from PALUSOL, a hydrated sodium silicate material, encapsulated in a vinyl film or an aluminium foil for the PALUSOL PL ALU version.

How the intumescent fire seal PALUSOL PL or PL ALU reacts:

When exposed to fire, PALUSOL PL and PALUSOL PL ALU are activated at a temperature of between 100 and 120°C, the vinyl or aluminium runs and a rigid, non-combustible foam is formed which offers a high level of thermal insulation. In contact with heat, the intumescent material expands in one direction to at least five times its initial thickness. The expansion pressure thereby generated can reach 1,5N/mm2. This provides an effective barrier preventing the escape of any flames, smoke or hot gases around the perimeter of a fire-resistant element which is sealed in this way.


Colours PALUSOL PL : white, black red ; PALUSOL PL ALU.: aluminium 

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For other colours please contact us.

PALUSOL PL and PALUSOL PL ALU are is intended for use where the requirement for mechanical resistance is reduced:

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Where mechanical resistance is required, the use of PALUSOL P or PALUSOL PM encapsulated in a rigid thermoplastic sheath is recommended. 

Examples of applications for intumescent fire seals PALUSOL® PL: peripheral seals for fire resistant systems (doors, shutters, dampers, cabinets etc.), with an anti-finger trapping system, circular fire dampers , enhancement of the fire resistance of various elements etc.

PALUSOL® PL & PL ALU I Intumescent fire seals