Saw this on the samba, i think it was syncroghia that posted in his thread about adding high top to his 16″ syncro. I thought it was a good idea so i gave it a go on the rear hatch.
It is just water pipe insulation, I think its foam polyethylene, cut to length and wedged into the cavity. Now that summer’s over one might find pool noodles going cheap and I think they would do too.
I like this because it is cheap and fast to install. No gluing and I don’t think it will trap moisture against the metal.
I stuck on a bit of peel and stick roofing stuff to dampen panel noise. My van had some factory applied bits already there. Remember this is a converted 7 passenger tin top. I don’t think we sties have the factory sound proofing in the back hatch, but they do have the dreaded fiberglass batting.
And just because i had some, i pushed in some 3/8″ thick closed cell foam. Left over pipe insulation stuck on lip of cut out.
I liked how it went in, I think I’ll do more of it.