So I’ve had this ongoing mass loaded vinyl odor issue. I have mass loaded vinyl hung as a wall (not putting drywall over it as it’s essentially just a frame to block some sound in a rental garage). It’s been hanging for about 2 weeks and I’ve used Zinsser’s Odor Killing primer on it hoping to seal the stink. It seems to be coming back through that. Any other recommendations to seal the stink? Would an exterior primer work better on Mass Loaded Vinyl?