I'm trying to identify a potting on this PCB. It is attached to a vehicle so it must be quite maleable and 'tough' to handle the jarring and occassional stress. My understanding is that it probably won't be Epoxy as it's too hard and will crack under stress. So what is it? Polyurethene? Silicon? Also how do I remove it? I heard the if its Epoxy then you would use a heat gun and a scalpel. Is it the same process if its Polyurethene or Silicon?