Let's face it, every hole in the firewall turns into a blowtorch on a hot day. Duct tape withers and blows away, but this adhesive-backed Reflect-A-Tape makes a quick yet lasting barrier to engine heat. It can also be wrapped around shifter cables and other hard-to-reach areas. We amazed a buddy with a Jeep by how fast we could make his rig comfy. Purists will be delighted to know that the tape can be painted to make it look factory cool like this olive-drab '47 Willys.