I did on a non-Mopar project. I used the product you pictured above (Insulating Paint Additive Makes Paint Insulate) and mixed it into Glidden Gripper, a latex primer/sealer product. I coated the fully painted floor (don't apply latex to bare metal!) of a pickup truck cab that traditionally gave me the hot foot treatment, courtesy full-length headers venting a stout big block Chevy.
I used just shy of a full gallon of the mixture, applying multiple coats by brush over a period of about 5 days - probably 7 or 8 separate coats, in order to build up a sufficient film thickness. I also used the Noico 80 sheets (from amazon) on top of it, which are a great economic alternative to brand-name products like Dynamat, but aren't the smelly asphalt based roofing materials that many DIY'ers use and frequently regret later.
Bottom line, the cab interior is noticeably cooler and quieter. I can't make any scientific comparisons between Lizardskin and the home brew concoction, but it seemed to work for me.