Any reason why I shouldn't use sound deadening on top side of wheel well?

[Mat1asBEV&ICE]

Hello, my tires are quite "sticky" and through out a lot of little rocks. I can constantly hear them banging the underside of the body in the wheel wells.

I painted with two layers of Herculiner which helped, but still noisy and I'm not confident it will provide enough protection from a larger rock when traveling at higher speed from causing a "star" break on the paint.

So, any reason not to stick the self adhesive sound deadening material to the body? This product (https://www.amazon.com/Siless-Max-sqft-Sound-Deadening/dp/B09Y5BQYGL/ref=sr_1_4?crid=MQNF1KSXKP8M&dib=eyJ2IjoiMSJ9.Y-t3Aq_XKjW07lhsllud2e0F4UY2KhgihtW5EaeRjzxXBXwRiDdV kfZACmWmyXRRhjRTIPMoTiN5v4J8AJFt8BQl-w7BLnkZRuotVt6lT9lebbkMOW8kFfOQTaxY2bk6czLiC16JlLr i1uBQKR-n4LBgzBJMJg619TFjAIf6mU_H3Jwj9TUQiiydAtsLDtXcvrJfh rt833KyzTD-9PgsJ2Fz379qxu0Lu1G34teOM2k.qquz0-P644oWyb7s4_soDj41YdOxX3oGjZrclK0MJZk&dib_tag=se&keywords=siless%2Bmax&qid=1744213354&sprefix=siless%2Bmax%2B%2Caps%2C155&sr=8-4&th=1)says it's specifically for wheel well exterior.

Thank you!

[Blitzboy54]

Will it stick to fiberglass (or Herculiner?)

[Mat1asBEV&ICE]

That's a great question. The product listing says "super sticky". Not sure what that means. I could try a small patch and see how well it holds up.

[Blitzboy54]

I would be interest to know myself. Would consider giving it a try.

[M22_COBRA]

I think I remember reading somewhere on here that Backdraft places the deadener in the wheel well before the "Herculiner". I think if you do it sanding and cleaning will be KEY. It needs to be as clean as possible as if you were going to paint then apply it with heat.

[Jeff Kleiner]

I've applied Herculiner in the past and it has kind of a pebble/grainy texture:

https://www.monstaliner.com/images/Herculiner.jpg

I'd think that would not allow the mat to make full contact and compromise it's adhesion. I guess you could give it a try---worst case is it falls off!

Jeff

[J R Jones]

I recently bought a used roadster that had a heavy black coating on the "B" side of the hood (glass mat). The coating had cracked and lifted in a dozen+ spots. Hitting it with high pressure air lifted it off in potato chip sized pieces. Getting the remaining film off with a 6in flap wheel was a PIA. It smeared in some areas and left a black trace in the texture. Besides the aesthetics, I had a modification to do and the coating had to go first.
I decided I would never use a similar coating anticipating that "repairs happen". Maybe there is a product specifically for raw glass, but it would still complicate repair.
jim

[GoDadGo]

I installed KILMAT on the tops of my fenders and the covered the KILMAT with more Raptor Bedliner.
The body was initially sprayed with the Raptor but I rolled that bedliner material over the KILMAT.
So far they are still stuck and the car has been street legal for about five (5) years.
The car does get driven weekly as the weather permits.
I used a roller because it was convenient.

[rich grsc]

I run super sticky Avon tires, two coats of bed liner and never a problem. You're over thinking it

[Mat1asBEV&ICE]

Thank you, everyone. I would be satisfied with two coats of Herculiner I already applied but the whole time I am driving I still hear high pitched "tic, tic, tic, tic...." from all the little pebbles hitting the underside of the body in the wheel wells.

I'm going to attached a 4"x4" piece, apply one coat of Herculiner around/over it, drive around a bit over a few weeks and see if it stays put. I'll report back.

[rthomas98]

I know DEI makes a spray on boom mat if you wanted to try that instead. I haven't used it on the roadster but have used it on other vehicles with good results. That will stick with a quick scuff and you won't have to worry about a mat dropping hitting the tire and potentially sticking to something you don't want it to.
https://www.amazon.com/DEI-Sound-Deadening-Enhance-Eliminate/dp/B07TTDRP6H

[PMD24]

I'd recommend speaking with techs at Dynamat and Damplifier (Second Skin). I spoke with both of them today regarding sound dampening and they were very helpful. Both have great reputations and will likely be candid with you on using their products in the wheel wells. They will send you small samples as well.

Pat

[Mat1asBEV&ICE]

Hello all. It has been four months so I wanted to circle back on this and say I have had decent success. I didn't do a test piece, instead I went for it and applied several pieces of those self adhesive sound deadening mats on the underside of the boy, inside the four wheel wells, on top of the two coats of Herculiner. In order to have good adhesion I first cleaned the area somewhat well and then applied the mats using a tennis ball to push them on as the Herculiner leaves quite a textured surface. The mats have not pealed/lost adhesion in the slightest.

It definitely has made an improvement, though the sounds from small debris hitting something is not completely gone. I think to fully resolve the issue I would have to apply the mats to the "elephant ears". Perhaps this is a greater issue in my situation as I have 18" wheels and all tires available are quite soft and sticky.