Fourth, Preheat the PCB marginally before potting. Warming the board to a small, Secure temperature aids the potting compound circulation extra smoothly and releases any air trapped in element gaps. Just be cautious never to overheat sensitive electronic pieces all through this move. Air bubbles or lousy protection upon potting https://www.jiadi-newmaterials.com/news/pcb-potting-compound-selection-guide.html