Paint shop cosmetic sealing

Cosmetic sealing applications

Learn more about our high-quality cosmetic sealing applications for paint shop

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Challenges in cosmetic sealing

A car’s design has complex geometries and many surface breaks where tight seals are critical, yet for reasons of aesthetics, they should not be visible. Areas using cosmetic sealing include e.g. doors, trunks and hoods, rear gutters, roof ditches, and rear lamps. These areas are often difficult to reach with precision, and applying an endless bead can be a challenge.

To fulfill these high demands in function, quality, and aesthetics, cosmetic beads can be applied with different application technologies. Selecting the right application technology depends on the geometry of the car body and customer requirements.

Mini flat stream

Mini flat stream is a low pressure application with high precision of material flow. The width and slot length of the nozzle determine the bead geometry. The application distance to the car part is approximately 3 to 5 mm. Our mini flat stream solutions provide a highly precise application, also on varying trim edges. The result is a smooth surface for excellent aesthetic appearance

Jet stream

Jet stream is a common streaming technology suitable for high robot speeds while ensuring high quality surface finish. The tool’s symmetry means no orientation of the nozzle. That allows easy robot programming. Jet stream can be customized to many sealing areas using a variety of nozzles with different shapes and openings.


Extrusion at trim edges (trim edge protection) avoids corrosion on a section that is not zinc coated. The process is used in high-stress areas such as wheel arches or on roof ditches. Our specific nozzles compensate for deviations in robot movements and car part tolerances. They also allow for a constant robot speed with a specific bead shape.