Kontaktfett

Kontaktfett is a grease or paste applied to electrical contact surfaces to prevent oxidation, reduce moisture ingress, and improve the reliability of electrical connections. It is commonly used on connectors, switches, battery terminals, relays, and other interfaces that experience vibration, humidity, or corrosion.

The composition and types of kontaktfett vary. Many products are silicone-based or petroleum-based and use different thickening systems. Some greases are dielectric, meaning they insulate the contact surfaces and act as seals, while others are conductive and contain metal powders such as silver or carbon to improve conductivity in difficult environments or where contacts are worn. The choice depends on material compatibility with plastics, rubbers, and metals in the assembly, as well as on whether the interface should conduct electricity or be insulated.

Application guidelines emphasize using only a thin layer. A small amount applied to the mating surfaces or to the connector before assembly is typically sufficient. Excessive grease can interfere with electrical contact pressure, attract dust, or compromise seals. In many automotive and industrial contexts, manufacturers specify whether grease should be used and what type is appropriate. Greases should be compatible with seals and insulation materials and may need replacement during maintenance if oxidation or contamination is detected.

Safety and disposal considerations include standard handling precautions for chemical products. Some kontaktfett formulations are flammable or may irritate skin; use in well-ventilated areas with appropriate protective equipment and dispose of used materials according to local regulations.

See also: dielectric grease, conductive grease, electrical contact lubrication.