Liquid egg whites

A search for 'Blanc d'oeuf liquide' throws up a product made by a company in Belgium called Cocovite.

http://www.cocovite.be/content/view/7/7/lang,en/

Give 'em a call and see if there is a distributor in Brussels. It looks a food industry thing though, and I'm not sure if it is found retail.

This company say the sell to the Food Industry and private people:

http://www.nevejan.eu/fr/blanc-d-oeuf-liquide-pasteurise-1l-cocovite.html

Dunno if that's what you want.

You can find those products in Makro stores,as well as in the Metro store , or Mdh food service (chaussee de Mons 1600 Spl).