Car Door Sound Deadening for Under $20! - BMW Z4 Vlog #20 

⚠Always disconnect your battery and let the car discharge for 30 minutes before removing any air bag connections. It can become a very dangerous situation if you dont. Im an ASE certified mechanic of 11 years. Good before and after video btw, thank you!

5 years ago i saw this video and I said to my self 1 day i will use this and now 2020 i am going to use it for my luxury sedan :) thanks alot.

Average summer temps here are in the 118F range.... Can easily hit 130+ inside the car. Wouldn't think of putting asphalt in the vehicle, it will melt and ooze and it will reek petrochemical fumes into the vehicle. I stopped the nasty bass bounce from my new speakers in my wide open empty truck doors with EVA craft foam sheets (comes in many thicknesses) and used Permatex high temp gasket maker to adhere it to the metal. Worked great!

I used a similar product under the carpet on my '68 Mustang. I primarily did it to keep the exhaust heat from coming through but an added bonus is the floor is now waterproof, Mustang floors rust easily. I taped up all of the seams with foil duct tape and after 8 years and countless summer driving trips I have never smelled the asphalt. The car is now a pleasure to drive on a hot summer day. The key is taping up every seam with the foil tape.

I just did the doors in my 2013 Hyundai Tucson. It now feels like a recording studio when the doors close. I can't wait to do the floors, where most of the tire noise seems to come from now.

Hey thanks for the instruction on how to do this. Just goes to show how far car manufacturers will go to save a buck. Thanks for sharing!!

Super! That's all I needed to know. Thanks. Most folks are afraid to remove door panels as 'there be beasties there'. Lack confidence. He showed it's easy.

Very good video I heard about someone decades ago doing this. He used asphalt around his door but never understood how.. Supposedly it made his car sound like a luxury car door when closing. Thanks for the video.

I bought a roll of this stuff and used it in the rear corners of the standard cab in my 1990 Cummins Turbo Diesel, when I replaced the rear speakers. You've got to have sound dampening in that! Works great. Even put an small, extra sheet over the fiberglass housing covering my air conditioning system, facing the downpipe of a custom 4" exhaust system, for extra insulation. Works great!!

This was a really good idea. Thanks for taking the time to share your idea!

you know, this video is where i got the idea for the cheap alternative for my own car. And a rattle can anyway, a 1996 Camry. But that insulation was very useful. aid had it stolen and they found it stripped in a tow yard afterwards. No interior at ALL (easiest way to the sound components). So i had a blank slate. I started with two layers of that on the floor , inside the doors on the outer skin, the firewall in bother sides doubled up. heated with propane propane torch and a wood roller to really get it on. Then a gallon on flex seal toweled on and left to bake in the texas august sun for 3 days with the doors open. Put heavy plastic down at one point plus the doors for a vapor barrier, after it had begun to solidify, and then glued the carpet back down. Lastly, the wheel wells made the biggest difference in dB. I rolled that flex seal on, then that aliminum air duct tape with the strands in it was over top. went from 110 db on highway @ 70mph…. to 63db. that was 3 years ago and i took all the panel and carpet off the clean em and upgrade the sound again, it’s all still perfectly good. thanks a lot bro

Applied this technique to a 2008 Subaru Tribeca with no weld issues, just zero noise dampening. I used Grace Membrane which is what I had on hand (and is as sticky as the adhesive used on the plastic insulation). You have to cover all your bases by at least covering 90 percent of empty spots while making sure you get into each corner as much as possible. I also took small strips and turned them into adhesive bumpers to put in between the cross braces and the actual door sheet metal, and I did this in at least four places on each cross member, making sure that two of the spots were the ends and that none of the membrane interferes with the window. The only drawback to this fixing the problem is that it fixed it TOO good meaning now I have to do the other doors.🤣😎 Excellent idea, sir!

Great tutorial. Thank you for taking the time to record, edit and share your experience. Cheers

Thank you for sharing the ideas on the Home Depot sound deadener! Great video.

Very good video and performance quality ! Definitely about to do this to my doors~!

Awesome video, great Idea and love the Time Laps, it makes it fun and easy to watch.

Never use an asphalt based product on a vertical surface as the heat will cause it to "melt". Asphalt is ok for a roof but not in a moving vehicle. If the shit falls off the panel, it could get bound up in your window mechanism and cause a lot of damage.

Great Video on sound issues with cars and older classics. Thank you Mike S. Colorado

It rang like a bell, great stuff!

Thank you for this! A couple days ago I got a great price on a used Subaru Legacy, but when I shut the doors, it rattled and screamed out "This is the cheapest Subaru Legacy available anywhere in the country." I ran to Home Depot last night and picked this stuff up (it now goes under the brand name Pro Force), and today the door makes a nice thump that says "This is a luxury car with real quality construction." I didn't put any on the plastic door panel, just the metal on the inside of the door. Loving it now, thanks again.

This is awesome! Thank you SO much for sharing!

nice vid. thinking about doing this to my new car after installing new aftermarket speakers.

tremendous difference...good job,and thanks for the heads up...im headed to home depot.

Great work man! Nice video. Keep it up

0:40 before 5:32 after

Inventive and resourceful for a few bucks! Thanks! Also great video work!

Great idea brorher. Thanks for putting this vid up.

What a great idea! Definitely can hear the difference. Who would have thought!!!

Aluminum and the butenyl is used to absorb vibration, not to be a sound deadener. 25% panel coverage is when you start seeing diminishing returns. Though you might see a marginal gain reduction in sound absorbtion doing full coverage over tiles. Vinyl, lead sheeting, serbothane, melamine foam are used for sound deadening.

Brillant idea, I’m going to try this on my Datsun project 👍

Thanks for the info/tip. Very useful!

Wow dude!! Awesome video! You just saved me a lot of money! Thanks!

I had a 2001 Dodge pickup. It was just a single cab, basic truck. I did this same, basic thing to the doors. It did help a little with road noise, but it made a huge difference in stereo aound. I just had a cheap pioneer deck with 2 6×9 speakers. One in bottom corner of each door. The doors became well insulated speaker boxes and the speakers put out a LOT more base with better sound. Enough that some people assumed i had a subwoofer. Thoroughly covering the inside of doors with sound deadener will also make a huge difference in door speaker sound if your doors don't have any sound deadener.

great tip bro!!!! most definitely going to try this on my project car!

I have been using Frost King Duct insulation for AC duct, it's come in a roll 12 inches wide and 1/2 inch thick. It is made for heat and cool reduction and work great for sound deadening. The coast is about the same it's less than $20.00 dollars a roll. So far no problems it has a sticky back and rolls and presses out to form around the whatever shape the doors are. You can find it at Home Depot and Lows in the Insulation isle. I just clean the inside of the door good and cut it roll it up to get inside the door and press fit it, use and little tape to seal it up and good to go.

Good Vid! The only downside of this approach is that if the car is left in the sun the tar melts and the tape falls off inside the door... don't ask me how I know...! (for reference I had the same problem with "Silent Coat" which was a LOT more expensive than the roofing strip

Thanks for the video man . Good job

Thank you for this Video. I have been searching to find good quality, and cheap do the same Job. Once again Thank.

WOW, thanks!!! I've been looking for an alternative and this one escaped me. Major difference in noise and not to mention helps with the heat as well!!! Thanks again for the vid.

Thanks for info brother.

Thanks for sharing. I was about to buy some mats (100cm x 1500cm) for around $22

Just came here looking for this. Saw this at the hardware while getting a fiberglass kit for my 1st try at custom speaker pods. I immediately picked one up and from the weight I could feel this was definitely a substitute, at less than a quarter of the price. Thank goodness I only bought enough of the pricey stuff to do the front doors. But you can bet your sweet ass I'm gonna completely cover my car now. Perhaps even myself, why not

You can spend over $100 on the "BRAND" stuff which is ridiculous. I bought this same product for my 2 dr single cab Dodge ram. I cleaned the surface and used 3M spray on glue with it and it's been on for 2 years straight with no problems. I covered the doors and the back. I have 4 speakers, a sub box and 2 amps and not only it sounds better now but it reduced road noise a great deal. No one is going to see the brand on the insulation if that's what anyone is worried about lmao. Good video, keep posting.

Dude! GREAT tip and video!!

Good Job homie! need to sound deaden my Passt B6 Vr6...the road noise can drive a person mad!

Thanks for sharing this information 👍

Thanks a whole bunch man!

Nice job. Thanks for the info man.

If you disconnect the car battery first, that should stop any false fault lights coming on. Reconnect it all afterwards though 😉

Great video! Helpful, I need to get my door off as window has stopped working

great video man!

I think this video is great. If we could match the volume to the music it would make the video PERFECT 👌 thanks again sir.

So i went back through becouse your vidio is the one I based my decision on using this stuff. I have a single cab dodge ram 2001. Open the pannels and a thin layer of plastic covers the doors. That's it. Very very basic on these trucks. So mine wasn't quite as pretty as yours, I used my hands to flatten and rub the sticky side in. I have full confidence that this stuff is going nowere quick. Once it sticks its practically over... lol I lined nearly the entire inside of my door in rows... right off the bat road test... just by old artillery ears, 50% reduction in noise level. This stuff is really amazing so for anyone who thinks that it won't work, stick your foot in your mouth. Take the leap and try it.... you will be surprised. It actually made my stock 2001 speakers so robust, I had to turn my sub level down by 3 levels on my stereo. Lol you have to do it yourself to believe the difference. It's only 16 bucks guys.... and thank you, for your vidio

great vid...thanks! would have liked to have listed to the sound level inside at fwy speeds before and after. do you notice a real difference in sound dampening inside your cabin at fwy speeds, passing vehicles, etc? thanks..

Youre a legend, thanks mate

Nice one. Thanks fella.

exactly what I was looking for,, thx for the info

night and day...thanks for the video

dude thx so much for this. great info!! i wonder if we can make our own speaker baffles too.

Awesome video!

You can take one of the terminals off of the battery so that when you unplug the airbag and plug it in after, you wouldn't get the airbag light.

Great vid man thanks

Nice video share :-). I agree with your idea 100% but for the same price you can get some real deadener. Trust me I am a car guy I also compete in SPL (Bass Competitions). Ive use Peel and seal and other similar brands it is asphalt based and will not perform like real deadener. Even used it on my own car, I eventually removed and applied some quality stuff. Don't get my comment wrong it did the job, but the car audio deadener does the job even better - car sounds like a tank haha.

Nice video!!! Imma going to do this on my crv!!!

the problem with cheaper sound dampening materials is longevity and the release of toxic chemicals. the material he used is similar to expensive products desingned to add weight to the metal, thereby lowering the resonant frequency. this reduces noises generated by the metal, reduces the ringing sound of a speaker playing onto metal surfaces, and to some extent it blocks a bit of road noise. however, to really block road noise, a noise barrier type material is needed. the most effective material to do this is thick butyl rubber composite mats. these are the even more expensive treatments that companies such as scosche, second skin, dynamat, etc sell. there's a guy on youtube, caraudiofabrication that has a pretty good instructional video on the different types of sound treatments and more importantly, how they should be advised. cheers. and thanks zed4me for the video. keep treating those doors man!

It works very well I've been using this in my systems for years. But I would suggest using a heat gun when applying.

Great work. Have you noticed any difference with a quieter ride on the road?

Solid video !

I don't even need sound deadening or have a z4 but this was satisfying.

I've always said that if someones spending more in sound deadening, than a quality set of components, they're doing it wrong. Foam behind the speaker on the door, and in front to couple to the door, are most important. Fastrings can do it for you quick. Just pricey for what you get. Peel n seal has never failed on me. But I also use roofing tar tubes to help adhere it too.

that dude is AMAZING !

Very cool and thanks. Should have put some tape on the wires that are loose. I know everyone’s a critic but just wanting to help the next guy. I ordered some sound skins but not enough to do inside the doors. Will run down and get that. Thanks again!

This is awesome. I never would have dreamt of doing this, but will now. The detailed instructions are perfect. Thank you.

Very nicely done! That material looks like it did the job, how much is that stuff?

Thanks for the video helped a lot

I know it’s old but thanks for this. I’m planning a diy sound system upgrade in a Honda Pilot. Reading through the comments I’ve got good pointers there for sound improvements too. Really helpful...

This is awesome!

I Just went to Lowes and Home Depot, Frost King was not sticky enough for my taste and Lowes had some stuff made from asphalt so I settled for Noico 80mil, 36sqft is about $60 on eBay and it is intended for Cars, Same as Dynamat

Bro, this is some good sh!t! I have done all four doors in my car and it sounds completely different. Thanks again!

good job man

I need this for my metal garage door, thanks

Awesome thanks man i was thinking i had to buy 2nd skin

I bought U.Seal WaterProof Repair Tape Home Depo today, I will install into door panel during Xmas vacation.

Perfect thank for this.

Cool Man! Thanks!

I'm a fleet mechanic work on 18 wheelers trucks and sometimes trailers. Well they have this stuff just like Dynamat it's called Imperial 7618 Trailer Repair Tape, 6" X 50' (6 inches by 50 feet) it's Butyl based NOT asphalt based so there is little no to order stuff works great it's about 70$ on Amazon maybe cheaper if you look around.

Great video

wow... thanks man. I was looking for videos about how to install the ones they sell online and ebay before buyind then and then I saw your video.. Great

Wow huge difference after

I've bought some polyurethane spray can for £3.99, in hope it will make the mid-bass stronger in my doors. Is this true and how much gap should I leave behind the speakers?

I put fiber glass on my doors and it works perfect too!

now this is a good tip!

Wait, that was the sound of you tapping on it and stuff, but does it reduce road noise?

Do they also use so called rock wool or polyurethane foam? And those active noise cancellation systems like in headphones, me likey. Do they already manufacture smartphone apps, that would drive simultaneously noise cancellation with radio play or something? There is microphone, then just in principle pi radians phase difference and right decibels and thats it:)

Outstanding video, you should do videos on how to do videos! Seriously!

Nice. What is this tape made for originaly? Roofing?

I did this way back in 2012. Got the same product from Home Depot. Installed on my 2007 Scion TC because the door speakers sounded like shit. Even good door speakers sounded bad. Night and day difference after installing it. My door speakers actually had nice tight bass too them afterwards. Opening and closing the door sounded way better as well. About to put this stuff in the door of a 2002 chevy blazer I just bought for my kid. Its a little cash truck practically given to me. Only thing is the door speakers sound as bad as the 07 scions did.

Oh boy, just watched a RU-vid of someone regretting doing something like this. Don't use stuff with asphalt. It will melt with high car heat then gunk everything up. And it will take all day to remove from one door. Use the butyl stuff that costs just a little more and you won't have any regrets!!

if you want to disconnect anything in a car (airbag, sensors, even certain lights) you have to first disconnect battery so it doesn't trigger codes

frost king duct insulation works just as well,and it is lighter in weight than peal and seal, and doesn't have asphalt based material in it