Good information to know, but not what I was asking. I mean comparing the two, the rust seal 3 step system (clean,blast, seal) VS the undercoating (whether it be asphalt or rubberized) is one better than the other between the 3 step system or undercoating paint.
I am looking to protect the frame and underside of the body on my jeep wrangler. I have previously used the 3 step rust seal system. Looking at your site you also have a dedicated rubberized/asphalt undercoating. Would one of these be better than the other? Or are they to be used together. I was planning to do the rust seal system with a blacktop top coat on my frame.