• boron nitride coating for highest performance
• for magnesium and zinc
• yields non-wetting, lubricating surfaces
• for the coating of ingot moulds of remelting plants of Rauch Fertigungstechnik, Austria
• also available in colour for better contrast
• contains "white graphite"


ALU-STOP LC25 Boron-Nitride-Coating is special coating for the non-ferrous metal casting and is characterised by a very high content of boron nitride. Thus ALU-STOP LC25 Boron-Nitride-Coating shows a very good non-wetting behaviour against Al, Mg, Zn and Pb as well as their alloys. It is an ideal high temperature release and lubrication agent for the coating of ladles, troughs, distribution troughs, moulds and protects these efficiently against attacks by aggressive melts. ALU-STOP LC25 Boron-Nitride-Coating is used succesfully for the coating of ingot moulds of the remelting plants produced by Rauch Fertigungstechnik, Gmunden (Austria). By the use of ALU-STOP LC25 Boron-Nitride-Coating when casting magnesium ingots the formation of oxides on the surface of the ingots is suppressed and the quality of the casting surface dramatically improved.


• Resuspend coating prior to use and dilute with distilled water if necessary (ratio 1:2 to 1:3).
• Preheat the cleaned ingot moulds up to 100°C (212°F).
• Coat the ingot moulds by brushing or spraying.
• Dry ingot moulds carefully. Do not contact wet coatings with metal melts.
• If ingot moulds are dry the next layer can be applied.
• Best performance of ALU-STOP LC25 Boron-Nitride-Coating is achieved by thin coatings (up to 50-150µm). Thick coatings may crack during use.
• Do not damage coating during use because damaged areas are not sufficiently protected.
• Tools may be cleaned with water.

Storage-Container Size

ALU-STOP LC25 Boron-Nitride-Coating must be protected against frost. A storage temperature of >5°C (>41°F) is recommended. The containers should be kept closed. ALU-STOP LC25 Boron-Nitride-Coating is available in 6kg-containers.

Technical Data


white or coloured

Ceramic Constituent

Boron Nitride



Solid Content (Boron Nitride)



1,20 g/cm³

Temperature (max. Application)

1000°C (at air)

1800°C (under inert gas)


© 2023 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst

These recommendations are believed to be correct. However, no guarantee of their accuracy is given. Therefore, purchasers shall make their own tests to determine suitability for their use. These products are offered for industrial and related uses (e.g. research and development) only. However the user must take the necessary precautions appropriate for products containing chemicals. This description does not imply the absence of any patents, the responsibility whatsoever solely rests with the user.

The Original