Maybe a very similar product. I used 3M and it too said liner/sound deadener, and I swear it looks identiacal to yours.
Got a very good discount on my cans ($5 each, normally $9 I think) and I layered it on very thick (multiple coats), especially in all the crevices, seams and all.
I think this is it
Awesome stuff. I could hit (easily) anything I pointed at from 3+ feet away.
You're method smarter, since you detached your cab.
Don't forget to spay (or seam seal) your welds, or both.