"Great Stuff" as a sound deadner?

[theCybe 5,000+ posts]

Fatmat and Rammat deaden by "mass loading" (adding weight to something) That weight alone is what you're using to lower the resonance of the panel. eg., a 1 oz piece of sheetmetal may buzz, whereas a 4 oz piece of sheetmetal the same size may not make a sound.

Remove and tap on the sidepanel on your computer case.

Tape a magazine to it

Now tap on it again - Notice the sound difference?

Great Stuff doesn't weigh a whole bunch, but if you can use it to add some pressure to the panel, the resistance will in fact deaden the natural resonance of the panel.

Like the magazine test above; Instead of using a magazine (fatmat), imagine pressing a big sponge to the other side of the panel. The sponge isn't gonna do much by itself, but with that pressure (since the foam expands) it works - even better, in some applications.

As far as warping your panels, if you use some common sense, that's not to be a concern.

What you may want to keep in mind though, is that the stuff is porous, and can get water trapped in it - thereby contributing to rusting your panels.

//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[snoopdan 5,000+ posts]

maybe not, but it's just kind of a concern of mine. safety>everything else.

Bass > saftey //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[NhustlaR 10+ year member]

i dont think the pannels will warp unless they are under pressure.......so as long as the foam has somewhere to go, there shouldnt be a problemo

 

[myvanpounds 10+ year member]

i dont think the pannels will warp unless they are under pressure.......so as long as the foam has somewhere to go, there shouldnt be a problemo

ding. this stuff goes everywhere. I just bulled a paper bag full of excess out of the truck

 

[HitManSE 10+ year member]

Heres a thought, how well does this stuff hold up should it ever get wet? Will it mold up? perhaps smell like crap?

 

[BassAddictJ 5,000+ posts]

Does this stuff actually "deaden"sound anything like matte products? I put a whole bunch of the shit around my trunk seal to stop the rattle. It helped some. It's pretty cheap too. Why not just run beads of this stuff back and forth under your door panel? Just dont get it on your skin or clothes...from personal experience...it wont come off!

it'll come off your skin

after a week or 2

 

[BassAddictJ 5,000+ posts]

after it hardens i dont htink it'll mold or be effected by water

this stuff is used for plumping applications....so i think it's made to resist that kinda stuff....thats why it's great (snare drum simble)

 

[SWEET06CAMRY 10+ year member]

My brother had a 95 T-bird and he put that shit in the trunk lid and a couple of days later the trunk looked like if it grew :boobies:

I guess that shit expanded so much it bent the trunk lid //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[PollyCranopolis 10+ year member]

Yes it will come off your skin...after you scrub it with brillo pads and harsh chemicals. It WILL NOT come off your clothes, unless you pick it off speck by speck.