I've been on a quest to silence all the rattles I can find while the back end of my interior is all ripped out for a speaker upgrade. Most of what's left are buzzes that I believe are coming from plastic cable holders that attach to mounting holes in the sheet metal with a plastic flanged stub (see items #8, 13, and 14 in this image for an idea of what I'm talking about).

Does anyone know of any possible alternative ways to secure cables to the single mounting hole these things attach to… or at least a non-destructive/non-permanent way to silence these things?

I've tried shoving a neoprene washer over the flanged stub where I can access the back of the hole, but that doesn't always work and I can only get behind some of the holes that I think are making noise.

 

Blob of silicone or what we used to call "Black Death" ,3M trim adhesive.
While my panels were out, I covered a lot of it over with a dynamat clone. I have so many rattles, it is hard for me to isolate one. Tape on the rear hatch bail is one fix. ( Dealer has adjusted it three times)

 

Hmm, taking off that idea, do you think something like this will work?
http://www.amazon.com/00686-Corning-...4928694&sr=1-7

 

Plain old silicone. Bathtub caulk, RTV, whatever you call it. Don't make it harder than it is. This ain't rocket science.

The only time you need "special" is if you need to resist solvents like in gaskets where there is oil, extremes in temperature, or if used in the engine/intake of a car with O2 sensors. Fumes from standard RTV will destroy O2 sensors. To see what I mean, go to an auto parts store and look at the Permatex brand. Read the labels for blue, grey, black, and copper silicone sealants. You will see how they modify the compound for the use. You only need the $2 tube from the hardware store. I would use whatever is open at the time.