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Belzona® Seals Sulfur Hexafluoride Leaks



Power (POWR)



Valves, Pipes and Fittings (VPF)


Customer Location:

Electric distributor in Australia.


Application Date:

February 2001


Application Situation:

Flange joints on electrical switch-gear where Sulphur Hexafluoride (SF6) is used as a gaseous insulant.



Leakage at flange joints due to breakdown of the original mastic sealer. There was also a breakdown of the original paint system on the equip-ment.



Belzona® 1111 (Super Metal)

Belzona® 3921 (GSC Surface Conditioner)





Application Method:

After blasting to remove existing coatings and mastic, Belzona® 1111 was used to seal the flange joint. Belzona® 3921 was then applied to create a base for a conventional paint that was spray applied to the area.


Belzona Facts:

A laser leak detection camera on the sealed flanges has revealed no leaks, and an order has been received for all 515 flanges on the site due to the success of the first application.


Photographs Description

  1. Existing joints showing failed paint system
  2. Belzona® 1111 applied to seal joint
  3. Area primed with Belzona® 3921
  4. Spray application of paint system to complete the application
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


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