2026 Integra Rear Sound Deadening

[XpoH]

The OEM stuff kind of sucks and if you put the CLD on top of it it’ll help the metal’s resonance but more effective to apply directly on the metal. I figured I’d spend the time to scrape it, since it was a simple job just labor hours to get it done. I want to put some additional insulation as well and this gives me a little more room.

That makes sense. I'm just not sure how much difference it would make, especially on a new car, but applying it directly to the metal does sound more effective.
btw, are you planning to add some foam like material on top?

Sponsored

 

[Boxen]

That makes sense. I'm just not sure how much difference it would make, especially on a new car, but applying it directly to the metal does sound more effective.
btw, are you planning to add some foam like material on top?

Yep, plan is to lay down some thinsulate all in the rear. Then doors and wheel wells next, maybe firewall but I don’t love the idea of tearing up the carpet.

 

[bisquick]

The OEM stuff kind of sucks and if you put the CLD on top of it it’ll help the metal’s resonance but more effective to apply directly on the metal. I figured I’d spend the time to scrape it, since it was a simple job just labor hours to get it done. I want to put some additional insulation as well and this gives me a little more room.

You’re correct that applying CLD on top of the OEM sound deadening is not as effective as applying directly to metal, but it’s incorrect to state that it amplifies the resonance; that does not make sense mathematically.

A similar example would be applying insulation to walls. Adding spray foam insulation (R-6) then fiberglass instillation (R-20) results in a total R values of R-26. The association is additive; same applies to acoustic resonance.

 

[Boxen]

You’re correct that applying CLD on top of the OEM sound deadening is not as effective as applying directly to metal, but it’s incorrect to state that it amplifies the resonance; that does not make sense mathematically.

A similar example would be applying insulation to walls. Adding spray foam insulation (R-6) then fiberglass instillation (R-20) results in a total R values of R-26. The association is additive; same applies to acoustic resonance.

Pardon my short hand, I should have added the word reduce or reduction. It’s not apples to apples comparing regular insulation either, CLD has exponentially diminishing returns when applied layer over layer.

In theory, applying to the metal or to the paste shouldn’t make much of a difference since the paste is a harder material and transmits vibration easily.

My understanding is that in application this breaks a little, since there are imperfections in the paste’s surface, application of the CLD, and the paste’s adhesion to the vehicle. In tandem with the application, the diminishing returns plays a role.

Again, I’m just focusing on resonance currently, sound wave transmission is different.

I just scraped to make sure my RESONIX lite was getting the most utilization and reducing chance of error. I also, and this is not scientific and honestly probably wrong, felt that the areas I tapped with the factory paste was just about as resonant as the empty spaces.

Sponsored