> Jim Sylvester
> I'm rounding the corner on the prep of my interior for restoration - all the
> tar insulation is gone and the floor pan has been cleaned (revealing no
> rust!) and prepped for 2 POR15 coats this morning.
>
> I'm now looking for some sort of insulation for the floor pan and
> transmission tunnel before I lay the carpet kit I got from Dean (that came
> with a pad already fixed to it!).
>
> Any thoughts on what type of material and adhesive to use? I seem to recall
> a conversation about a thin reflective material from 3M that reduces the
> heat and does a decent job deadening sound. I don't want anything too thick
> since Dean's carpet already has a pad on it, so I would sure appreciate the
> list's thoughts.
I had good luck with DynaMat TacMat on the rear cab wall of my base model
'93 GMC P/U and am planning on using DynaMat Extreme on the floor if I ever
decide to really work at getting it even quieter. Maybe use this version in
the roadster, too. It's supposedly more rugged than the TacMat while still
offering acoustic dampening. I do have some sheets of original DynaMat that
I want to use in the doors of the truck, but that may have to wait awhile.
Getting inside the doors on a GMC P/U is a real PITA.
There are supposedly much cheaper equivalents of the DynaMat products but
I'd suggest staying with something specifically designed for the heavier
usage it'll get in a car rather than generic insulation from Home Depot or
Lowes. I bought mine from Crutchfield. Great customer service and free
shipping (depending on the total cost of the order) made the bottom line
cost less that buying it locally.
I think that 3M spray-on adhesive is, hands down, the best thing to use if
you want your material permanently installed, with a big emphasis on
permanent if you spray an entire panel. Depending on the shape of the area
and where it's located you might consider just using adhesive in a few spots
to hold the insulation in place. For the most sound deadening you'll
probably need to spray the entire panel. From an acoustic viewpoint this
stuff works more by dampening the drumming resonances of large/flat panels
than by totally covering the panel. You can cover the entire panel if you
want, but it's really not necessary just for sound deadening.
FWIW,
Ron
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