Air Bubbles are the most common issue in PCB potting, Nevertheless they’re completely avoidable that has a couple uncomplicated, verified methods. Bubbles can weaken the protective barrier and produce weak spots, so getting ways to stop them is well worth the additional energy. Prep safely and securely and Collect equipment: https://www.jiadi-newmaterials.com/news/pcb-potting-compound-selection-guide.html