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I’m not sure if thinsulate is the same thing, but you might also want to look at Mass Loaded Vinyl with a closed-cell foam underlay (can be bought together as o

by vosper 6y ago

I’m not sure if thinsulate is the same thing, but you might also want to look at Mass Loaded Vinyl with a closed-cell foam underlay (can be bought together as one sheet). It took me quite some reading up on road noise to realise that MLV, and not the butyl/Dynamat kind of sound deadener, is the key to reducing road noise, and is what luxury car manufacturers use. I’m planning to do the floor of my RAV4 in the next few weeks. never taken the seats out of a car before, should be interesting.

the_pwner224 6y ago
I just did a bunch of research for this on a new car I'm getting. From what I was able to learn, the CCF and MLV block road & tire noise, but the butyl sound deadener products are still important to stop the sheet metal from vibrating and to stop resonance in the door cavity & trunk. 25-50% coverage with butyl directly on the sheet metal is enough, since it doesn't block sound, just absorbs vibrations. If you tap your doors or trunk lid, or if you swing the door shut, the sheet metal will have a tinny hollow sound, but after butyl all of those become more of a solid 'thunk.' Overall, the butyl stops the sheet metal from making its own noise and from amplifying the tire vibrations; then the entire surface needs to get 100% unbroken coverage of the CCF/MLV to block all types of noise from entering. Demonstration: https://www.youtube.com/watch?v=_ur_Rhi5js8 https://www.youtube.com/watch?v=_ur_Rhi5js8
- vosper 6y ago
  I think the affect of the butyl dampener on actual internal vehicle noise is minimal. I've done that part, and my doors close thunkily now (not that I ever cared) but the car is just as loud as ever inside. I think that unless you're going for high-performance audio, there's really not a whole lot of value in the sound deadener. > 25-50% coverage with butyl directly on the sheet metal is enough This is true, you see in a lot of the professional installer videos that they will cover the whole surface in the deadener, but it's not necessary.
robocat 6y ago
Reasonable MLV article (advert but OK): https://www.secondskinaudio.com/sound-blocking/ https://www.secondskinaudio.com/sound-blocking/ And another article aimed at home usage: https://www.snoringsource.com/mass-loaded-vinyl-alternatives/ https://www.snoringsource.com/mass-loaded-vinyl-alternatives...
PaulDavisThe1st 6y ago
Sorry for the delay in responding ... been on the road in our van :) MLV is an entirely different material and is used for an entirely different purpose than thinsulate. It is not useful for stopping road/wind noise, but does help to dampen vibrations and resonance in the metal body of a vehicle. It is a dampener, and will not cut down much on the type of noise we have left in our vehicle. MLV has a problem when used for automotive uses. To be maximally effect, it requires an air gap on both sides and must not be rigidly mounted. Apply MLV to the surface of a vehicle body will do approximately zero for noise. MLV is widely used for sound reduction in buildings, where it is much easier to mount it in ways that allow it to significantly dampen sound transmission. High end cars use thinsulate as well as dampeners. Most Mercedes and Lexus' (at least) are lined to the gills with automative thinsulate, along with dampeners applied in critical locations.

by vosper 6y ago

the_pwner224 6y ago

I just did a bunch of research for this on a new car I'm getting. From what I was able to learn, the CCF and MLV block road & tire noise, but the butyl sound deadener products are still important to stop the sheet metal from vibrating and to stop resonance in the door cavity & trunk. 25-50% coverage with butyl directly on the sheet metal is enough, since it doesn't block sound, just absorbs vibrations. If you tap your doors or trunk lid, or if you swing the door shut, the sheet metal will have a tinny hollow sound, but after butyl all of those become more of a solid 'thunk.' Overall, the butyl stops the sheet metal from making its own noise and from amplifying the tire vibrations; then the entire surface needs to get 100% unbroken coverage of the CCF/MLV to block all types of noise from entering. Demonstration: https://www.youtube.com/watch?v=_ur_Rhi5js8 https://www.youtube.com/watch?v=_ur_Rhi5js8

vosper 6y ago
I think the affect of the butyl dampener on actual internal vehicle noise is minimal. I've done that part, and my doors close thunkily now (not that I ever cared) but the car is just as loud as ever inside. I think that unless you're going for high-performance audio, there's really not a whole lot of value in the sound deadener. > 25-50% coverage with butyl directly on the sheet metal is enough This is true, you see in a lot of the professional installer videos that they will cover the whole surface in the deadener, but it's not necessary.

robocat 6y ago

Reasonable MLV article (advert but OK): https://www.secondskinaudio.com/sound-blocking/ https://www.secondskinaudio.com/sound-blocking/ And another article aimed at home usage: https://www.snoringsource.com/mass-loaded-vinyl-alternatives/ https://www.snoringsource.com/mass-loaded-vinyl-alternatives...

PaulDavisThe1st 6y ago

Sorry for the delay in responding ... been on the road in our van :) MLV is an entirely different material and is used for an entirely different purpose than thinsulate. It is not useful for stopping road/wind noise, but does help to dampen vibrations and resonance in the metal body of a vehicle. It is a dampener, and will not cut down much on the type of noise we have left in our vehicle. MLV has a problem when used for automotive uses. To be maximally effect, it requires an air gap on both sides and must not be rigidly mounted. Apply MLV to the surface of a vehicle body will do approximately zero for noise. MLV is widely used for sound reduction in buildings, where it is much easier to mount it in ways that allow it to significantly dampen sound transmission. High end cars use thinsulate as well as dampeners. Most Mercedes and Lexus' (at least) are lined to the gills with automative thinsulate, along with dampeners applied in critical locations.