NVX Sound Deadening Melting Failure
In the submitted examples shown, NVX sound deadening appears to display severe butyl melting, dripping, and physical instability. The material is visibly flowing out from under the foil, contaminating nearby surfaces, and in several cases dripping badly enough to create long, nasty runs. This is a full catastrophic visible failure.
One detail worth paying close attention to is the release paper. You can see oil in the butyl leeching into the wax paper, which is another ugly clue as to what this formula is doing over time. That kind of behavior points toward a butyl formula that is far too liquid-like and unstable for this type of product. If there is enough oil in the butyl formula of a CLD to leech into wax paper…. That’s not good.
The overall failure pattern looks very similar to the KnuKonceptz examples. Based on what is shown here, the most likely cause is a bad butyl formula, likely with too much petroleum-based content and very poor high-temperature stability. Once a CLD reaches this stage, its physical stability is gone.
Functional failure was absolutely happening before the visible failure became this obvious. A CLD that is softening, flowing, bleeding oil into the release paper, and dripping out from under the foil was no longer acting like a stable viscoelastic damping layer long before it got to that point. The visible mess is simply the point where the failure becomes impossible to ignore.
I have heard about NVX sound deadening failures from people in the past, and this is the first especially solid set of submitted examples I have seen documenting it. NVX is often recommended as a good value or budget product. From purely a reliability and performance in real world use standpoint, these examples do not support that reputation.