Home ALU-STOP HC Boron-Nitride-Coating
Description | Application | Storage | Safety advices | technical Data

ALU_STOP HC for aluminium, magnesium, zinc and lead
yields non-wetting ceramic surfaces
no sticking of melts and castings 
for ladles, dies and ingot moulds 
shows hard and abrasive-resistant layers
contains "white graphite"
Oben Description

ALU-STOP HC Boron-Nitride-Coating is a special coating for the protection of foundry tools and moulds. It produces a hard and abrasive-resistant coating. Due to the use of boron nitride ALU-STOP HC Boron-Nitride-Coating shows very a good non-wetting behaviour against aluminium, magnesium and heavy metals such as zinc and lead. ALU-STOP HC Boron-Nitride-Coatng protects tools and ladles against attacks by aggressive melts. At the same time adhering of melt remainders is prevented. Due to the hard and abrasive-resistent layers ALU-STOP HC Boron-Nitride-Coating cannot be used however as high temperature lubricants, for example when releasing castings from moulds. For this application the concentrates ALU-STOP LC25 Boron-Nitride-Coating and ALU-STOP LC15 Boron-Nitride-Coating as well as the ready for use products ALU-STOP LC10 Boron-Nitride-Coating and ALU-STOP LC5 Boron-Nitride-Coating are available.


Resuspend coating prior to use. Dilute with distilled water if necessary. 
Application on clean surfaces is possible by painting or spraying. Best results may be achieved by spraying onto warm surfaces (50-150°C, 122-302°F).
Dry thoroughly. Do not contact wet coatings with metal melts. Additional layers may be applied after drying. 
Best performance of  ALU-STOP HC Boron-Nitride-Coating is achieved by thin coatings (up to 50-100µm, 2-4mils). Thick coatings may crack during use. 
Tools may be cleaned with water.

ObenStorage-Container Size

ALU-STOP HC 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 HC Boron-Nitride-Coating is available in 6kg-containers.

ObenSafety Advices

ALU-STOP HC Boron-Nitride-Coating contains water and is free of solvents. According to data available to us ALU-STOP HC Boron-Nitride-Coating is a non-hazardous preparation. However, this product is alkaline and therefore labelled irritant. The use of suitable gloves and goggles is recommended. An EC material safety data sheet is available. 

ObenTechnical Data

Colour grey
Ceramic constituent Boron nitride
Solid content  36%
Density (g/cm3) 1,15
pH  11-12
Application temperature (max.) 1000°C (1832°F) (at air)
  1100°C (2012°F) (under inert gas)

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© 2004 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.