Don’t get on here much, since I have sold my Vegas - but they still send me stuff. So not sure what you are insulating - but if you are trying to quell engine/ road noise what you are using will not do much. I used mass loaded vinyl / like is used to quiet recording studios, etc. - and the car stereo addicts use - really quieted down the cab. I posted a how-to under “Stan fowler “ - Search if interested.......
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