Dynamat Xtreme - Keeping Your Cool

I installed a section of Dynamat before bolting the air tank in place, so that didn't have to come out, but the whole "sunken floor" section where the gas tank lives was covered too. Hopefully the Dynamat will help reduce the noise of the air pump. A 1 1/2-inch-wide strip on either side of the recess was left bare, as this is where a cover will mount, probably using Dzus fasteners or similar.

In a similar manner to Dynamat, the Dynaliner has an adhesive backing, though I found it was a lot easier to remove and reposition if a mistake was made. Despite being a foam-like material, it will not absorb water.

Here's the front half of the roof with Dynaliner installed. I'll wait to install the rest until after the Chevy is painted, as foam collects all manner of dust, and I want to keep it clean. Oh, if you're wondering why I haven't insulated the doors and decklid in this article, I'm still on the lookout for replacement doors for my rusted out originals and the decklid was at the sandblasters at the time I installed the Dynamat. And while I'm talking replacement panels, if anyone has a pair of inner front fenders, I'm desperately in need of a set!

With the Dynamat installation complete, I moved onto installing the Dynaliner. This is an ultra-lightweight insulator designed to be used on top of Dynamat, with high heat blocking properties. It is available in 1/8-, 1/4-, and 1/2-inch thicknesses. I used the 1/4 inch on the underside of the roof, as recommended in the instructions. For a foam-type material, Dynaliner is easy to cut with a razor knife.