Yes it is 3M cavity wax. Absolutely forgot the name, this wax is for prevent of rust build up inside the body panels where we usually can't see,
Just clean with with a thin metal wire or something similar, they are quite visible. And can be easily done, infact should be done periodically to prevent clogging.
See these cars are not high end SUVs these are our normal daily driven cars they are designed to take in and let out water.