Hi, Alain, I used RMA (Rosin Mildly Activated) flux that I obtained on eBay. It has the brand name of Powerfix, and is to DIN EN 29454-1, and is manufactured by Abraham Diederichs GmbH & Co, Oberkamper Strasse 37-39, D-42349, Wuppertal, Germany. This flux is a soft, light honey coloured paste, a...