This high-reliability flux is specifically developed for higher thermal impacts (high/long preheat with increased contact times) like in Pb-free wave soldering. The flux shows high SIR values under the most critical test conditions. IPC J-STD-004 classification REL0 Cobar 390-RX-HT Physical and chemical properties 1.SG @ 20 °C [kg/dm3] (+/- 0.5%) :0.813 2.Halides [Silver-Chromate Test] :Pass 3.Halides [Potentiometric] :Pass 4.Solids content [% w/w :2.20 5.Water content [% w/w] :5. 6.VOC-content [% w/w] :92.00 7.Flashpoint COC [°C] :12.4 8.Odor :alcoholic 9.Color :colorless 10.Test report(s):avaiblabe