Affordable, heat tolerant damping material

Tweakers' Asylum

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My listening room has a convective heating unit in it - basically a big sheet metal box with hot water circulating in tubes at the bottom. This thing has way too much resonant surface area. While it isn't pretty as is I don't want to make it even more ugly by slapping damping on the outside. What can I put inside the enclosure that isn't too thick (ideally around 1/4" or less), will stay in place and not off gassing noxious shit at temps that could reach
140F, provides great damping and doesn't cost a fortune? Anything from the automotive world possibly?
I also have a DiaNorm steel radiator I'd like to damp. Same heat issues. Whatever I use will probably have to go on the exterior so think small, discreet and preferably transparent or white.
Thanks for any suggestions.

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Topic - Affordable, heat tolerant damping material - plantsman 16:40:18 11/03/05 (4)

Re: Affordable, heat tolerant damping material - fmak 21:57:11 11/03/05 (0)

Re: Affordable, heat tolerant damping material - Bare 20:34:46 11/03/05 (0)

Dynamat X-treme plus Hood Liner - Al Sekela 17:41:47 11/03/05 (1)

Re: Dynamat X-treme plus Hood Liner - plantsman 03:12:53 11/04/05 (0)

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