Sound Deadening Material Question

industrial wholesalers offer great products for the fraction of the price that others charge you.

 

Great pictures Magnum, 'preciate it.

 

Do you happen to have a link?

 

lol. www.mcmastercarr.com

 

http://www.mcmaster.com/#sound-absorbers/=axeuso

 

the shiny butyl/foil backed material is from the second skin. I like it due to the foil thickness and the rubber/butyl and not the roof tar/asphalt - which I have not tried but the theory behind it, asphalt/tar, is not something that I would like to risk putting into the vehicle and spending my time and trying to do good job, just to find out the 1st layer was junk/garbage/crap.I'm sure mcmaster may have something similar to the second skin - I just have not tried it yet.



I now have 2007 vnl780 and have done the front portion of the cab - removed the seats, carpet-rubber. Installed sound deadening material, then sound absorbing material/foam and reinstalled all of the factory carpet/rubber back on. Insulated it under the hood, as well, left the front end - above the radiator/coolant - bottle exposed - I want this area to be exposed and have as much air flow as possible and cool it better. Then, installed the foam in the cubby hall where the engine is going " into" the cab. - Took it for the spin - BIG difference. When the truck is cold and idling the difference can bee seen but not as much. When driving - difference can be noticed. I have not done the roof or the back portion of the volvo - have not figured out - yet - how to remove the cabinets off of the truck - yet. doors are untouched - for now - need to have an ambient temperature in the 70's minimum - in order for the compound to dry properly. Plus I'll spray under the cab with it as well.

 

Magnum, I'm confused when you say you put down "sound deadening material, and then "sound absorbing material." Do you mean you put down stuff with the foil first and then just plain foam?

 

YES. the sound needs to be deadened 1st. EX: tap on the door panel of almost any car or plain sheet metal and you will hear the high pitch sound. After deadening it, also called applying more mass, on the metal the sound does not appear to be existent, you'll hear a THUMP sound and not the DING or DONG sound. Then, you need to use the foam that was MADE - I REPEAT - MADE - to work as the sound absorbing foam. If this is laid on the floor I would recommend using the correct foam with vinyl backing to further quite down the sound and make the foam last longer and have the low chance of water getting onto it and having the rotten smell later.