"Anti-Squeak" compound....what to use?

[Harry Moon]

I used some plyable material I got from a glass shop, about 2 1/2 inches wide, 1/8 thick black, I first used it to put under the gas tank straps, I then cut it and punched the bolt holes with sharpened used 303 rounds. I used the same material for the back of the cab to the floor, and betwwen the roof and the back and front roof to the firewall/windshield, I will be also putting it under the windshield mounting frame. I also found this material at Kenworth, but they didn't have much so I got a 50' role at a glass shop.