All repair and maintenance tasks shown should be done by professionals only. Please do not try this at home or if not qualified by professional education. Always follow car manufacturer's instructions. Limitation of liability.

Seam Sealing

with ribbed beads

Sealing applications in the automotive industry have increased significantly during recent years. Learn everything you need to know about seam sealing in vehicle body repair from the use of standard beads to reproduction of OEM textures.

Get the Materials

In vehicle repair it is crucial to reproduce the same quality and visual appearance provided by the original OEM seams to avoid corrosion. With the below instruction you can recreate ribbed beads using flatstream or widestream (acoustic) beads.


Heating Cartridge

Heating the product allows easy application (lower pressure) and smooth texture. Pre-heat cartridges in the heating device (max. 60°C).
NOTE: Remove bottom lid from cartridge before heating.


Surface Preparation

Remove all contamination from the surfaces and pretreat the sealing area with TEROSON VR 20.


Preparation Cartridge

Remove bottom cover and open cartridge. Screw on nozzle tightly.
Insert cartridge and adjust nozzle to working position. Horizontal or vertical application. Use the stabilising ribs for guidance during application.


Air pressure adjustment

Adjust main air pressure on supply unit to between 6 bar (min) and 10 bar (max).  Adjust application pressure on TEROSON ET GUN POWERLINE II handle.


Producing flatstream beads

Applying the seam sealant with nozzle contact on the surface; 3 to 7 bar application pressure required with TEROSON ET GUN POWERLINE II. Applying seam sealant at a distance of 5 to 10 cm from the surface requires higher application pressure e.g. 10 to 15 bar with TEROSON ET GUN POWERLINE II.


Producing widestream beads

Before applying sealant, tape beginning and end of the application area. Remove the masking tape before the beads form a skin. Widestream bead (to reproduce acoustic applications) 8 to 12 cm in width = pressure at 15 to 22 bar and distance to surface of 8 to 12 cm.


Additional application tools

There are different application tools that can simplify the application. E.g. the flexible hose allows you to work even in areas with minimal space. A  spacer can be used to keep equal distance to the surface or to guide along the edges.

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