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sound deadening?

crashandburn

crashandburn

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My diesel K5 has just bare metal floors, and it is friggin' loud inside. LMC sells a (stock?) sound deadening kit for like 65 bucks. Would that combined with a new carpet make a big difference in interior noise? Would I be better off going to lizard skin or dynamat? Keeping in mind that this is a budget build, is there that much of a difference between stock stuff and the expensive stuff to justify the price difference?

I plan on spending a good deal of time in this truck, more than just wheeling, so I really want it to be livable.
 
Use some of that undercoating spray it inside,then use some dyno matt or some type of stuff like it with the new carpet and that should take care of that...friend did that to his 1970 chevy and it made it alot more quiet inside the cab.
 
I would not recommend undercoating spray inside. It stinks pretty bad and it stays rubbery and may git sticky if the floors get warm.
 
Dynamat is an OLD product that was taken from the construction industry. It is called Sill Seal and goes on the bottom plate of a wood walled construction.

It costs about 1/10 of dynamat.

You can find it at Home dept, lowe's, etc.

Sticky on one side, like a butyl rubber material and Aluminum on the other.
 
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Times 2 on the home sill seal stuff :waytogo:, then spring a little of the saved money on the rubber backing on the carpet (not much more money but much more sound and heat insulation) and you will think your in a new car:woot:

And it will look great too! oh yea forgot about that:pimp:
 
Rubber backing on the carpet? Do they make the molded carpets for our trucks that way or is that something that you have to just get a sheet of carpet and fit it in? I don't mind doing that, but where can I find it?
 
x3 on the sill seal. But I now think it is in the roofing dept. At least that is where I came across it. From what I can remember (been a while) Dynamat is only about 1/2 as thick as this stuff. Be warned, this stuff sticks to just about anything in a "permanent way, especially itself.
I would recommend covering floor completely with this stuff and then your choice of rubber floor or carpet. You really don't need the insulation, and to be honest it causes more trouble than it's worth.
 
Here's another tip: If you really want it to be quiet in your truck, you need to do the wheel wells AND the sides of your trucks, especially in the back. You also need to do your door panels. The sides of your truck let in a ton of noise.

Just be sure whatever you use you can get the carpet/panel back on. If you get stuff that is really thick, it may cause fitment problems. Try some without actually gluing it on first, especially at the edges like where the door sills meet the carpet.
 
crashandburn said:
Rubber backing on the carpet? Do they make the molded carpets for our trucks that way or is that something that you have to just get a sheet of carpet and fit it in? I don't mind doing that, but where can I find it?
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Yea like Teck says its "mass backing" and it is a rubbery backing molded to the carpet and doesn't add much to the install difficulty (imho) but really adds to the quality, and no on the sheet of carpet way too many corners and dips it would never work, they mold the carpet over a floorpan to make it fit.
acc makes a good product BUT you can buy their product in their box cheaper from classic and other folks. And lastly the brown bread or dynamat or sill stuff adds bulk and work that some would say not needed unless high end sound equip is in the plans.
Either way is sure to thrill you compared to bare floor or spray in bedliner.:waytogo:
 
I did mass backing on my carpet, it sure did make it nicer. Also, put one layer silver side padding under the front, and 2 layer under the back.

You can see pic on my build.
 
The best options for sound deadener is a mixture of a Sound Deadening Liquid and good quality carpet padding. I've used this in my car for killing road noise works like a charm.

There is a budget way to do this also but its not as nice of a finish product. Lots of car audio people (including myself) use ice and water roofing material to line the interior of their cars. The only down fall is the smell when it gets hot out the material degases. Lay down 2 layers of ice & water throughout the cabin and layer of padding with carpet the sound level will virtually killed off.
 
This was probably one of the threads where some of the posts got lost.

Best info you can find on sound deadening http://www.sounddeadenershowdown.com/cgi-bin/index.cgi

Just FYI dynamat is not Sill seal at all. I have put in both, not even close, totally different.

Some have good luck with the roofing products, some do not. I have done the roofing products in 2 different trucks (not my own) one worked awesome. The other one stunk all the time and it would fall off of just about any vertical surface we put it on when it got below about 20*.

Just too hit or miss for me.

there are some products that are the same as the roofing stuff though.
 
quick roof - sold at home depot....cheap. I have had it for over a year - no smell. I have carpet installed on top of it.
 
shady said:
Or if you want actual dynamat but cheaper get it from these guys.
http://www.onlinecarstereo.com/CarAudio/p_21408_Dynamat_10465.aspx
http://www.onlinecarstereo.com/CarAudio/p_12654_Dynamat_10155.aspx
decent prices. but it is still pretty much a simple product that is available in many cheaper forms.
Click to expand...

You think that is cheaper?:haha::haha: GTFO!

blazinzuk said:
This was probably one of the threads where some of the posts got lost.

Best info you can find on sound deadening http://www.sounddeadenershowdown.com/cgi-bin/index.cgi

Just FYI dynamat is not Sill seal at all. I have put in both, not even close, totally different.

Some have good luck with the roofing products, some do not. I have done the roofing products in 2 different trucks (not my own) one worked awesome. The other one stunk all the time and it would fall off of just about any vertical surface we put it on when it got below about 20*.

Just too hit or miss for me.

there are some products that are the same as the roofing stuff though.
Click to expand...

I beg to differ, they changed the name and found a stickier more resilient/denser rubber for high and low temps, but it is the same.

There are other products that look similar, but Sill Seal is what you want.

K5_Fla said:
quick roof - sold at home depot....cheap. I have had it for over a year - no smell. I have carpet installed on top of it.
Click to expand...

:waytogo:
 
I wasnt saying its cheaper than the sill seal or quik roof stuff. just cheaper than you can get actual dynamat at most places. they get even better deals now and then. plus they have other brands. I figured he might not want to chance the smell issue. some say they smell it some dont. nobody smells dynamat though. the other products also get sticky on both sides when hot. could cause problems in the future.:dunno:
 
54inches said:
I beg to differ, they changed the name and found a stickier more resilient/denser rubber for high and low temps, but it is the same.

There are other products that look similar, but Sill Seal is what you want.



:waytogo:
Click to expand...

Like I said I have used both, they smell different, they feel different, they adhere different, they cut different one is thicker (the sill seal).

Where they are the same is they use a foil back, the dampening materiel while similar is not even close to the same. I cannot find the chemical breakdown of it anywhere now the link I had is no longer there.

They do work the same though. They add weight to a panel allowing said panel to vibrate less.

Wanna know one of the absolute best dampners out there?



LEAD works ten times better than dynamat or any tar/butyl roofing product. or rammat or brown bread or any cascade product etc.

But eliminating the vibrations is the panels is not sound proofing what comes next is sound proofing. Putting in a barrier and a decoupler
 
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