Silicone gasket 125 48888982

Protection of connections in heating and ventilation systems

When installing heating appliances, chimneys, or ventilation systems, ensuring tightness at wall or floor penetrations is critical. A 125 mm diameter silicone seal designed for pipes solves leakage issues while maintaining connection flexibility. Thanks to the use of high-temperature-resistant material, this component effectively isolates the space around the pipe, preventing heat loss or the ingress of flue gases and moisture into the building interior. It is a universal solution suitable for both new installations and the modernization of existing systems.

Thermal resistance and material properties

The material used for this seal is a specially formulated silicone, allowing operation at temperatures up to 200°C. This temperature range makes the component safe for applications directly related to gas boilers, solid fuel stoves, or flue gas ducts. Unlike cheaper plastic alternatives or ordinary rubber, silicone does not lose its sealing properties under heating and does not crack during repeated thermal cycles.

Due to its construction, the seal:

• Allows certain axial and radial pipe movements without loss of tightness (compensation for thermal expansion).
• Ensures a permanent seal of the space between the pipe and the mounting opening.
• Is resistant to aging caused by atmospheric and chemical factors present in the installation environment.

Practical application and installation

Installing the seal is simple and requires no additional adhesives or sealants—its function relies on precise geometric fit and material elasticity. Simply place the component onto a pipe with a nominal diameter of 125 mm and insert it into the prepared opening in the wall or floor. This solution significantly speeds up installation work, eliminating the need for complex masonry tasks around the pipe.

The seal is suitable for several key areas:

• Wall penetrations – provides a tight seal of technical openings around flue and smoke pipes, which is required during boiler installation.
• Ventilation systems – acts as acoustic and thermal insulation at ventilation duct penetrations through building partitions.
• Heating installations – effectively prevents water or flue gas leaks at pipe penetrations through floors between levels.

It is important to remember that proper sealing is not only a matter of compliance with building codes but, above all, operational safety of the equipment. The 125 mm diameter seal is dedicated to standard pipes used in domestic heating installations and small mechanical ventilation systems. Installation should be performed so that the material is in full contact with both the pipe surface and the edge of the mounting opening. This ensures complete gas and thermal tightness without the need for additional insulation layers around the penetration itself.