Asphalt based or butyl?
Thread Starter
Registered User
Joined: Aug 2014
Posts: 264
Likes: 0
Asphalt based or butyl?
First, yes I searched and I did find a few topics, but didn't find anything that really broke this down.
I also googled and didn't seem to find any good answers.
I have a ct engineering exhaust on my s2k. It sounds amazing. With the top down, it doesn't bother me. With it up, the noise is really loud and its hard to have a conversation
I've looked up dynamat and alternative brands. I'm leaning towards GTmat and it has awesome reviews. The problem I have is that its asphalt based. I've been reading that you shouldn't get that, but it never explains why its bad. All the searches I've preformed show an example of roofing asphalt based materials and not something such as GTMat.
Anyone have input on this? More specifically has anyone ever used an asphalt based sound deadener without issue?
I also googled and didn't seem to find any good answers.
I have a ct engineering exhaust on my s2k. It sounds amazing. With the top down, it doesn't bother me. With it up, the noise is really loud and its hard to have a conversation
I've looked up dynamat and alternative brands. I'm leaning towards GTmat and it has awesome reviews. The problem I have is that its asphalt based. I've been reading that you shouldn't get that, but it never explains why its bad. All the searches I've preformed show an example of roofing asphalt based materials and not something such as GTMat.
Anyone have input on this? More specifically has anyone ever used an asphalt based sound deadener without issue?
Joined: Aug 2012
Posts: 7,904
Likes: 3,435
From: Foothills East of Sacramento
I did an extensive NVH (Noise, vibration, and harshness) attack on my S. See the links below.
Essentially you have two main areas of dealing with NVH. (There are other things you can do but these are the low hanging fruit) You use a resonance damper (B Quiet, DynaMat) and some other sound deadener (I used 3M Thinsulate)
The reason why, IMO, you should NOT use the asphalt based material is smell. Why bother? I have read reviews that those who have used such products have smelled the asphalt for a long time down the road. The Bquiet does have some of those compounds in it but it is suspended in butyl and does not have any odor, none. DynaMat is similar to the B Quiet but a little more expensive. I would spend a little more and get the extreme version; high performance and its thin and easy to apply. The big thing to carry away is you don't need to cover everything. You only need 35-40% coverage for the resonance material to do its job. Even I was carried away (see the pics) and probably went overboard. I was also going for a little thermal insulation too. Now, if you do not have some other NVH blocker (Thinsulate) you may want more coverage.
I did not put anything forward of the doors and cockpit crossmember. I am glad I did not; its nice to hear the engine rev up. Once I am at highway speed cruising I do not have any droning at all. The sound system is much better now.
I did add some to the top, believe it or not and I will soon post on that removable fix and install.
https://www.s2ki.com/s2000/topic/107...#entry23139579
https://www.s2ki.com/s2000/topic/108...#entry23181666
Essentially you have two main areas of dealing with NVH. (There are other things you can do but these are the low hanging fruit) You use a resonance damper (B Quiet, DynaMat) and some other sound deadener (I used 3M Thinsulate)
The reason why, IMO, you should NOT use the asphalt based material is smell. Why bother? I have read reviews that those who have used such products have smelled the asphalt for a long time down the road. The Bquiet does have some of those compounds in it but it is suspended in butyl and does not have any odor, none. DynaMat is similar to the B Quiet but a little more expensive. I would spend a little more and get the extreme version; high performance and its thin and easy to apply. The big thing to carry away is you don't need to cover everything. You only need 35-40% coverage for the resonance material to do its job. Even I was carried away (see the pics) and probably went overboard. I was also going for a little thermal insulation too. Now, if you do not have some other NVH blocker (Thinsulate) you may want more coverage.
I did not put anything forward of the doors and cockpit crossmember. I am glad I did not; its nice to hear the engine rev up. Once I am at highway speed cruising I do not have any droning at all. The sound system is much better now.
I did add some to the top, believe it or not and I will soon post on that removable fix and install.
https://www.s2ki.com/s2000/topic/107...#entry23139579
https://www.s2ki.com/s2000/topic/108...#entry23181666
Thread Starter
Registered User
Joined: Aug 2014
Posts: 264
Likes: 0
Extremely informative. I'm going to pick up some B-quiet ultimate. I'm also thinking of covering that with some quiet type paint. I probably won't be doing the trunk, simply because of the lack of results from it. I do plan on doing what you've shown on your post.
I may also look at doing the top at some point, but I'd have to figure out exactly what I needed to do that.
I may also look at doing the top at some point, but I'd have to figure out exactly what I needed to do that.
Joined: Sep 2004
Posts: 1,574
Likes: 62
From: NJ USA
If you haven't stumbled on it already, you may want to take a look at http://www.sounddeadenershowdown.com/.
Before he went into business selling stuff, the site had info about all kinds of experiments he did with other people's
products. You can look at archived copies of his old website with the Wayback Machine; here's one from 2008
Before he went into business selling stuff, the site had info about all kinds of experiments he did with other people's
products. You can look at archived copies of his old website with the Wayback Machine; here's one from 2008
Registered User
Joined: Jan 2014
Posts: 24
Likes: 0
I've used asphalt ones to deaden my floor under the carpet and doors. There was a smell, but it only lasted about a week, even then it wasn't too bad. Temporarily Went away after about 10 minutes of driving windows down, only comes back when the car sits. Performance wise, there was obviously a difference in audio quality. However not so much for road noise and other outside noise. I used GT mat by the way. My 2 cents.
Joined: May 2006
Posts: 623
Likes: 6
From: Palm City, FL
I like www.knukonceptz.com and www.raamaudio.com for deadener. I highly recommend picking up a deadener product (whatever you choose), a layer of closed cell foam (ensolite from raam is the most common used) and some type of noise barrier, such as mass loaded vinyl. Even a roll of this stuff from home depot will make a huge difference in terms of blocking drone and road noise. Deadener will mainly stop vibrations and tighten up any hollow sounds coming through your panels, but the MLV is what will really block noises from coming through. http://www.homedepot.com/p/Unbranded...96BX/100663624
Thread
Thread Starter
Forum
Replies
Last Post
