Stainless steel does rust eventually --- a case in point is the stainless
steel coolant pipes that run under the 83.5 to 85 vanagons. I'm sure you can
guess how I know this.

Cheers,
Doug

On 7/21/08, Chris S <szpejankowski@gmail.com> wrote:
>
> Well, I bought some exhaust wrap, but not to wrap my exhaust, mind you.  I
> needed to shield some not-so-hot parts from the hotter-than-H parts.  I've
> read reports of exhaust headers rusting very quickly after application of
> fiberglass exhaust wrap.  Why?  The stuff soaks up water like a sponge and
> holds it.  Yes, I just tested it.  So you can imagine what happens over
> night when the dew point drops, no?  Yes.  The doom of all bare steel,
> moisture, gets sucked up against the headers.
>
> It seems that sealing it against moisture would be the correct way to apply
> the stuff, which can be done by applying the appropriate and expensive
> sealant.
>
> No problem for stainless steel headers, right?  Maybe not so, since the
> wrap
> causes the temperature of the headers go up, which may be too much of heat
> stress for the metal to handle.  And that might be another DEEP, DARK
> secret
> in itself.
>
> Chris S.
>

--
http://www.dougalcock.com