Review on 🚗 Al's Liner Ceramic Insulation HNR - 1 Gallon - Heat and Noise Reducer for Cars, Trucks, and Audio Noise Control by Jonathan Olson

Al was a pleasure working with, customer service was quick to respond to all my email questions and I like the Al insert I inserted. the bottom of my Jeep Wrangler (TJ). In addition to Al's liner, I used this Al's HNR as directed, I actually applied it slightly thicker than the recommended "31 mil" to the hottest spots in my Jeep pan, front floor pans and transmission tunnel. I measured my jeep's floor temperature before and after, the ambient temperature and the jeep's surface temperature were about the same before running the jeep for about 30 minutes, and then checked the temperature before and after applying. Al's HNR & Al's Liner. The maximum temperature is 136.5°F before coating, 133°F after coating, and the Harbor Freight thermometer I measured has an error of +/- 2%, so I'm actually less than 1% lower in temperature than could be seen prior to coating. Basically there is no temperature difference. Definitely not enough for the effort. I can't tell if this affects the noise as I covered it with Al's liner and I'm sure it's Al's liner and not XHP if there is a significant reduction in noise. The Jeep has a fabric top with oversized tires, so even with Al's liner it's not exactly quiet on the road. If I had to do it all over again I would just do Al's liner and drop HNR altogether.