Installation Essentials

We would like to illustrate you some concepts of the pressing installation:

Fixing of the Profile Gasket

Profile gasket with backing

The Profile GasketProfile Gaskets avoid water intake, corrosion, dust, and dirt. They improve the acoustic os the vehicle.
During vehicle assembly, automobiles are outfitted with a wide range of profile gaskets and seals.

The function and body structure of the vehicle is shaped by the inner characteristics of the material and the external appearance of the gaskets.

Vulcanized rubber is often also used in the manufacturing of profile gaskets.

A backing which functions as a base plate is placed in the profile gasket.

Various forms are available due to the variety of vehicles in the automotive market, for example: 

  • Seals with crepe lips;
  • Seals coated with anti-seize compound;
  • Seals with flock-coated areas;
  • ...

These seals are developed new for every type of vehicle and the design and function are adjusted to the desired application.

Expanded metal plate

The Backing

Seals and gaskets are equipped with a backing to hold them securely on the sheet metal flange.

As a rule, this backing consists of a formed sheet metal strip or a coiled spring wire.

The backing influences the flexible and elastic behaviour of the profile gasket or seal at the vehicle. It may consists of aluminium or steel.

Before the extrusion

During the manufacturing of these gaskets, the backing is bended u-shaped.

Thereby the caoutchouc can be extruded very closely on the backing during the process of extrusion.

Special extrusion devices accomplish several vulcanized rubbers and bring them into the desired shape.



The backing and the cooperation of the inner rubber lips in the tighting zone play an important role for the later hub of the seal on the car body sheet.


Sheet-metal flange

The Sheet-Metal Flange

Car bodies are made of seperate sheet metal parts. Many sheet metal parts are bonded together at the joint patch by spot-welding or laser welding.

This sheet-metal flange can vary in it's thickness.

Delivery condition

Delivery Condition of the Profile Gasket

The backing's bending angle has been pre- adjusted to make the pre-installation easier.

The profile gaskets are converted to a certain length by the profile manufacturer.

The profile gasket is often assembled to a ring by the process of vulcanization. 



Pre-assembly 1

1.) The Pre-assembly

The pre-assembly occurs on the already coated and corrosion-resistant car body.

The profile gasket is mounted on the sheet-metal flange manually.

Pre-assembly 2

The profile gasket should keeps itself on the sheet-metal flange.

Final Assembly

2.) The Final Assembly

The Multiformer is applied.

It works with a pressing roll and two bending rolls which are driven in the opposite direction.

The Multiformer is conducted manually and with slight pressure over the profile gasket. 


The pressing roll squeezes the profile gasket on the sheet-metal flanch. With the help of the bending rolls the backing is formed and the gasket is fixed on the sheet- metal flange.



The profile gasket is press formed on the sheet- metal flange as far as it will go.

The Multiformer fixes the profile gasket.

The clamping lips are squeezed optimal on the sheet- metal flange in the inner profile gasket.




The clamping lips can function optimal as a sealing element because of the high contact pressure of the reinforcement.


A Filmic Summary



Installation process


1 = Pre- assembly

2 = Final Assembly of the Multiformer