The difference is Dynamat is just the lightweight elastomeric butyl and no
aluminum layer.
> Hi, Mike -
>
> I wouldn't swear that the stuff I tried to use was "Dynamat", but my
> recollection is that that was the brand name of what I bought at the local
> auto parts store. It has been a few years, and my memory certainly isn't what
> it used to be, so I could be mistaken.
> Another thing I remember is that it was quite expensive for a 3' x 4' piece.
>
> Is there a difference in material and construction between "Dynamat" and
> "Dynamat Extreme"?
>
> Steve Byers
> HBJ8L/36666
> BJ8 Registry
> Havelock, NC USA
>
>
>
> ----- Original Message -----
> From: m.brouillette@comcast.net
> To: BJ8Healeys ; healeys@autox.team.net
> Sent: Monday, July 18, 2005 5:32 PM
> Subject: Re: How 'bout those burning feet?
>
>
> Steve,
>
> What you used couldn't have been Dynamat. They have no felt.
> It's rubber and foil.
>
> Mike Brouillette
> 59 Bt7
>
>
>
> From their website...
>
> www.dynamat.com
>
> Dynamat Xtreme is a patented, lightweight elastomeric butyl and aluminum
> constrained-layer vibrational damper. Dynamat Xtreme conforms and fuses easily
> to sheet metal and other hard substrates. Material performance is optimized
> for temperature ranges between 140F and 1400F (-100C to +600C). Material can
> withstand temperature extremes between -650F and +3000F (-540C to +1490C) and
> is highly resistant to aging.
>
> Appearance:
> Black butyl based core with 4 mil aluminum constrain layer, craft paper
> release liner
>
> Thickness:
> 0.067" (1.7mm)
>
>
>
> > Hi, Doug -
> >
> > I tried using Dynamat, which is a felt material faced with aluminum foil,
> but
> > I found the foil very delicate and vulnerable to damage, and the loosely
> > packed felt made a mess when trying to glue it down. A much better
> solution
> > is the 1/4" thick double aluminized Mylar-faced plastic bubblewrap
> insulation.
> > I found this in a local building supply store. It's easy to cut and fit
> into
> > place (make a paper template first), and very durable.
> >
> > After sealing all the air leaks in the firewall, insulating my floors with
> the
> > bubblewrap, and covering both sides of the fiberglass transmission tunnel
> with
> > the same stuff, my BJ8 is no hotter in the cockipit than any other car
> without
> > air conditioning. Before I did this, one summer the heel of my
> accelerator
> > pedal shoe melted!
> >
> > Happy Healeying!
> > Steve Byers
> > HBJ8L/36666
> > BJ8 Registry
> > Havelock, NC USA
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