Boron-Nitride-Coating Grade A
high temperature lubrication and release agent
• for coating of ceramics, graphite and metals
• yields non-wetting surfaces
• for metal melts like aluminium and magnesium
• for bending glass
• good thermal shock resistance
• good thermal conductivity
• contains "white graphite"


Boron-Nitride-Coating Grade A is a special coating on the basis of boron nitride. This coating shows a very good non-wetting behaviour against many metal melts (e. g. aluminium and magnesium) as well as against silicate melts (glass melts). With Boron-Nitride-Coating Grade A it is possible to coat metals, ceramics and graphite in order to protect these against aggressive melts during high temperature application.


• Resuspend or shake Boron-Nitride-Coating Grade A prior to use. Dilute with distilled water if necessary.
• Application on clean surfaces is possible by painting or spraying. Small components can be also dipped. Porous ceramics and fiber ceramics should be damped before applying this coating.
• Dry thoroughly. Do not contact wet coatings with metal melts. Additional layers may be applied after drying.
• Metals are preferably coated by spraying onto warm surfaces (50-150°C) (122-302°F).
• A thin coating application (50-150µm) is favourable. Thick layers may crack during use and chip off.

Storage-Container Size

Boron-Nitride-Coating Grade A must be protected against frost. A storage temperature of >5°C (>41°F) is recommended. The containers should be kept closed. Boron-Nitride-Coating Grade A is available in 1kg-containers and 6kg-containers.

Technical Data



Ceramic Constituent

Boron nitride

Solid Content (Boron nitride)



1,1 g/cm³

Temperature (max. Application)

1000°C (1832°F)

1800°C (3272°F) (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.