Home Solder-Stop BN25
Description | Application | Storage | Safety advices | technical Data

Brazing very good non-wetting by solder 
very good separation efficiency 
perfect protection of the substrates from solder 
compatible with most solders
application such as house paints
concentrate for highest requirements 
contains "white graphite" 
Oben Description

Applying the boron nitride coating of the type Solder-Stop BN25 covers areas of the substrate to be protected efficiently and prevents during the brazing the unwanted running of the solder. Solder-Stop BN25 is applied to the areas to be protected by brushing or spraying. It can be used at air to 1000°C and is compatible with mist materials used with brazing such as copper solder, silver solder or AlSi-solder. Solder-Stop BN25 is suitable with the brazing of iron, copper and nickel material as well as aluminium. As a ready for use version for standard applicationthe product Solder-Stop BN10 is available. Alternatively the quick drying product Boron-Nitride-Coating Grade E can be used.


The surfaces which can be coated should be clean, dry free of dust, perhaps degreasing may be necessary. 
Only after long storage time Solder-Stop BN25 should be stirred. 
Solder-Stop BN25 can be applied by brushing or spraying. Dilute with distilled water if necessary. 
In order to achieve even coats spraying is recommended.
After the application the coating must be dried carefully, either at air or if necessary in a drying furnace or with a gas burner.

ObenStorage-Container Size

Keep containers closed and protect product against frost. A storage temperature of >5°C (>41°F) is recommended. Solder-Stop BN25 is available in 1kg-containers and 6kg-containers.

ObenSafety Advices

According to data available to us Solder-Stop BN25 is a non-hazardous preparation. An EC material safety data sheet is available.

ObenTechnical Data

Colour white
Ceramic constituent Boron nitride
Solid content (Boron nitride) 25%
Density (g/cm3) 1,2
Application temperature (max.) 1000°C (1832°F) (at air)
  1800°C (3272°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.