Why are you guys so rude? He is trying his best to be informative. He reminds me of my Asperger kid. What if this was your loved one? I found him informative. Thanks for the video.

Very informative, and you don't look nerdy with the shirt. You looked presentable and professional. Just like a job interview, what you look like is just as important to many as what comes out of your mouth. Good information.

Thank you for the lesson on dampening and deadening. I believe this to be one of the most non-biased truth and fact filled video's I've seen on the this topic. Especially notable is the closed cell foam / butyl adhesive floor/door/roof/fire wall application. Spot on my friend. I know this video is older, but people continue to put asphalt based roof patch in their cars in 2017... Coming from a music industry back ground, and an ear for room acoustics, this gentleman has it correct. Thanks.

Thanks for the information, I can see your passion for wanting to help others. May the lord be with you man.

This is the most informative video on sound dampening product after browsing KZfaq for over 40 minutes. Great job!!

This is one of the best teaching video on sound deadening and sound proofing. Great job man !

I love your example of subwoofer sheet metal rattle sounds, it’s spot on!!

Don't shoot the messenger people. This guy just saved me a LOT of trouble. I was gonna go with U Seal to sound deaden my car but thanks to this video I'm NOT gonna make that mistake. I live in Los Angeles where the summers get REALLY hot and the U Seal would definitely bleed out in that case. It really pays to do research and listen to/read a variety of reviews.

Best video about understanding SQL the right way and how to get it done without screwin up a car. Very well spoken thanks for the vid.

Answered near every question I had. GREAT VIDEO! Thanks for helping me out with my research. :)

thanks for the info, and props for handling jerk posts so calmly, being the better man isn't easy.

I used the rubberized asphalt peel and stick rolls of underlayment when I put the roof on my small house. We did it in northern Maine in November. On a warm and sunny day, the stuff can become semi-liquid and somewhat squishy. On a cold day, it can become somewhat inelastic and brittle and it does smell in the warmer weather. I wouldn't use it on anything other than what it was designed for--roofs on a building.

I used 2 1/2 inch thick Blue Hawk rubber mats from Lowes. It is a condensed rubber mat, a thick and effective sound barrier. And it is heavy, 22 lbs exactly for this 3' x 5' solid piece. Normally sold to be a door mat in large buildings, it only costs $22 per mat. It is not covered with aluminum foil, but no heat can pierce through this mammoth; So, it is an effective heat barrier. Although it won't melt, I still use an aluminum sheet heat barrier along the muffler line to prevent any problem. A single sheet covers more than my trunk entirely. It eliminates all noises, provides a protection against shocks and increases adherence so objects stay in place in the trunk. A Dynamat, GTMat or Road Kill solution would have cost me 5 times that much for a lesser result. I also paved most of the car floor below the carpet with it. I have no more noise at all.

Thanks for the video. I used on my Saturn (which I just sold 3 days ago) was Quietcoat. Painted it onto all the metal surfaces. It can be painted or sprayed on, but it does have to cure overnight. Of course I then took 2" thick closed cell foam and put that under the fiber board carpeting they have behind the rear window. The air for the speakers could only go up and down. Now I'm just doing research for new speaker installation on my new car. Again thank you for your input.

Very informative vid thanks from the U.K

Thanks for the video, very informative -- you're a natural teacher with great speaking skills.

Thanks Bro! Gonna help with my Land Rover Defender. Sounds pretty much like a tank right now! Since I'm overseas I can't easily get the Dynamat stuff, so I'm going to go with closed cell foam. Cheers!

You have a very good flow of speech. The train of logic is easy to follow. I enjoyed this video very much. Appreciate it!

Very informative, thanks!

that's a very good idea adding balist to your trunk lid! I never thought of that I'm a give it a shot thx keep em comin!

I like to hear my FORD rattle! It makes me feel YOUNG AGAIN!

You Legend! Make more learning videos please. You have helped me understand the real facts of sound deadening

Very good video, answered all my questions. THANK YOU!

Awesome video man. Informative and pleasant to watch.

thanks for the review, im on track with closecell foam to quiten road noise, (good reminder from you)rolls Royce use 2" slabs of this material in side their cars watch their assembly video here on you tube, BMW do a similar thing on the under side in plastic trays .

Interesting. I appreciated the reasoning, I'd like to know more about how different materials diffuse or reflect different frequencies. I'm seeing a lot about fabric materials "absorbing" sound quiet well at all frequencies, but absorbing doesn't seem to kill lower frequencies like that of an engine and doesn't reflect the sound seemingly like aluminium or lead barriers. I wonder if it's more effective to reflect or absorb.. tricky. Thanks for the tips

HELL NAW ! AM NOT SKIPPING IT !! watched it all the way BIG THNX MY MAN

Wow... Very good points. I have more ambient road noise and exhaust drone than anything. Was going to order Rattle Trap for the floor, but I've still got a bit of research to do so my deadening project will be as effective as possible.

Hey man, thanks for this video. I don't know if your info is right but I enjoyed watching you and meth or no meth... your still a good-looking guy and you made me laugh. I'm about to see what else you got on KZfaq so I can watch you teach me something.

Very informative video thank you

Very informative video, definitely the smartest guy on youtube talking about this subject. Thanks alot mate:)

Really good video! Going to save me tons of time researching.

VERY informative!! Great video!!

2:42 Best sound on the internet!!! lol

This helped a lot! Thank you for putting the effort in making this video.

you video is extreamly informative do more

This vid finally answered many questions now to get some work done

I use sound deadener in addition to closed cell foam for reducing rattles, ambient noise, and reinforcing a speaker baffle for my front components and my 6x9's.

Great video, you spoke very well on the subject.

Well done sir. Very concise.

greatest video ever! thanks for the advice!

Thank you this video was extremely helpful

Thanks for the info Joe really helpful great video!

Very informative..thanks

Really helpful, thanks a lot for posting

Cool sweater. Probably a golf pro and just got his Bemer soundproofed. Good stuff

Excellent video.

It was a really good video, especially at 2:42

been in the autobody buz for along time rather then add weight to trunks doors, etc you can adjust the locks to close the panels to make a tighter seal. After all anything loose makes noise Sound waves bump in the road. With my doors I adjusted the locks 1/4 back Inside of my door panels have rocker guard (rubber) leaving the bottom lip inside untouched to let out any water the drain holes to prevent rust. The door panel frame is a x 4 8" strip of 2-way rubber tape and a sheet of plastic..added weight is around 2lbs cost me $35 CDN per door and it puts dynomat to shame

Mass Loaded Vinyl is best for blocking sound. Closed Cell Foam works to reduce panel noises. And Aluminium covered rubber (aka Dynamat), prevents sheet metal resonances. They should generally be applied -> Dynamat -> CCF -> MLV in that order. MLV needs 100% coverage. Dynamat needs 25%-50% coverage. While CCF is used as needed between friction prone surfaces. As you can see, Dynamat (sound deadener) is only a small part of the overall process.

Great info, thanks for posting this video!

all this negativity come from those ripping people off with bull shit remedies, I am a sound engineer and this guy makes complete sense

thanks very informative

Great tips. Thanks.

It's been more than 4 years ths review is made. can you please compare the latest products in the market, that would be very helpful. Thanks for the educating video, and I appreciate your effort to help others. regards, Sriram

Thanks for sharing you thoughts. This was exactly what I was looking for! This is a 3yr old vid. Has anything changed in the materials used for sound deadening?

thank you sir. great video.

The spray sounds the best option to me, since you can do thin or thick as you please, and is cheap, two cans can go longs ways, I covered a 17 feet Dodge Ram van extended cab and on top I put a insulation board to install my carpet great results cool when hot warm when cold, and the best part; makes my old van run quiet like a brand new car would, so yes by far spray comes perfect

Cheers bro! just wondering, i have a loud exhaust, and was wondering if mattress underlay would also work as a sound barrier? Its made out of foam with an egg carton shape design, also thinking of using ordinary foam to block all the major holes that noise can seep through. You think its a good idea? or am i just being wayyy too cheap. Cheers mate

Really helpful info. Thanks

Nice vid, think you did an excellent job dropping some of your knowledge and clearing up some of the falsities of cheap dampening materials and adhesives. You had mentioned you thought there were better subs then JL Audio. I have been a long time fan of that brand (since the 90's). Im just curious as to what brand or brands of subs you think can out perform JL and that are less expensive. I also have some DIY brands that you might be interested in looking into.

@joestl314 Another solution to rattles. mostly to do with the trunk is a high density foam or if you can find it, thick gel pads on the joints. like banging a rock against a pillow instead of another rock

sir, your video is really helpfull .if i use closed cell foam should i add a layer of thin aluminium membrane on top. thanks in advance .

Very interesting, thanks for the info!

dude where did you buy the drank? i used to be sponsored by them for skateboarding but i lost contact with them and havent been able to find it since

Thanks for the video. I just bought the peel and seal stuff yesterday but never installed it. I'm just going to buy the real stuff to play it safe.

Nice info there. I was thinking of going for the roof deadening type, but after watching ( and listening to) you it really isn't the way to go. Again, thanks for the info!

Thanks for the info.

Very informative video I have rattles that I hate & I have some weights. . . I see a project in my future. Do you Recommend a glue I am thinking gorilla glue or some kind of epoxy.

had some very good points there

Ok a sound dampening material holds the panels together and softens the blow from sound waves onto the metal, if you know about shoring, it is the same idea. You spread the impact out over a larger surface area. Yes it adds weight but that is not the main abilty. As well as that the extra layers keep exterior noise outside of the vehicle. An additional benefit is that the sound dampening materials is that they also insulate the vehicle keeping temperatures stable as the insulation in your house. You can't just add a piece of metal onto your trunk and expect it to stop rattling. The metal is what is rattling against other metal.

best sound proofing video.

My problem is my exhaust note interfering with my bass from my sub. I think for this the dynamat would be best at keeping the exhaust wound from messing with the bass frequencies.

You just saved me some money! Thanks

Great video thanks for the info!

Great video,Big Thanks. But i want to use deadened to Enhance Bass response from door speakers. (Trying not to add a sub to the car) Rockford Fosgate T265-S with 225 RMS amp pushing them. my thought is just to use peel & seal... to seal up all the opening and firm up /reduce flex on the door. Whats the thought on this? Does this stuff work for this?

That rattle impression was awsomec

I know about soundproofing in general, not so much about car soundproofing specifically, though it's all the same in principle. If you're trying to keep sound from exiting or entering the car, you need extra mass (particularly dampened mass) which will line the entire inside of the vehicle. I've you're wanting to stop rattles, you need dampening between where two metal panels meet. Yes, heavier materials will have a different resonance frequency, and yes the weights you added to your hood acted like a clamp on the metal of the hood so that it didn't resonate as badly, but that's still just one part of the issue. I'm not vouching for any products or anything, just pointing out stuff. Also, foams don't deflect so much as they absorb (the sheet metal deflects more sound than the foam does). Soft closed cell foams have a sound absorption coefficient of around .5 or greater, meaning they allow about 50% of the sound to penetrate; while it is doing so, a bit of it's power is being absorbed and converted into heat. Closed cell foams seem to work better for low frequency, as they sort of behave like bass traps. Again, sort of. Oh, also if it adhered to the metal and not just sort of hanging there, it will help to dampen the resonance of the metal (the metal won't oscillate as severely nor for as long of a period of time).

thanks for this video, i was gonna try peel and seal, but living in texas with 100 degree weather in the summer i think i'm gonna pass on that.

Great video

people say meth fuck em dude you made a good video thanks for the help dude

Thank you sir!!

As far as trunk rattles, I can only see two issues other then junk in the trunk, rather the rubber seal has compressed to a point where the latch rattles or its when the adhesive that holds the inner frame to the outer skin fails, this also happens on roofs. Of course you could have a other issues under the car that causes rattles.

cld sheets like dynamat besides adding weight add mass to lower the resonant freq of the sheet metal and therefore the whole vehicle bass CAN have higher volume output and lower resonant freq with cld since it isn't fighting the resonating sheet metal like a woofer out of phase they are NOT to get rid of rattles, if you have pieces rattling put some silicone in a syringe and give a little squirt behind the pieces that rattles. people spend hundreds of dollars trying to fight rattles when all they needed is a 1oz syringe full of silicone

Great Video 9 years later ..

Very helpful!!

Intelligent dude. Hes right about adding weight. Take a 1" nut and glue down with epoxy in the middle (and on the backside)of a panel and it makes alot of difference. Cool vid

good lookin out Joe 💯

solid video man .

what foam do you think is good for sound proof, cause my 90 is noisy in the road?

Thank you for the informative video.I am still a lil confused if you are saying the Closed Cell Foam and something like dynamat are two different things?...like...should i layer with dynamat and then additionally with a closed cell foam?

I've been doing a car audio blog for a little while now and much of it has been about sound damping. In my experience, and based on my casual research and conversions with experts, it's generally the consumers who are wrong. There is some poor information coming from manufacturers, but the biggest companies with the premium prices aren't out to rip people off. I don't believe every Second Skin product's claims, but their CLD is worth every penny.

I work in the insulation industry/ commercial & industrial..foil facing in un-necessary in auto insulation, its used as a vapor barrier to protect against condensation. Joestl314 is right, closed cell foam..or plain rubber sheets...are most effective because each "closed cell" soaks the sound, because its a closed cell theres no where for it to go.It's basically rubber sheets..alot easier to apply as well

Okay so I have a question. I am currently in the middle of a build to put 2 18 inch subwoofers in the bed and 4 12s behind my seats in my truck. I was thinking about coating my campershell with sound deadener to try and help with the vibrations so my campershell would not start cracking. (It is fiberglass) I do not care about the noise of the rattle, I just need enough vibration control to keep it from breaking. Would gluing weights to it fix this? I feel like it would but I want to double check

Great idea. How about just put some magnet on the panel to add weight?

Thanks brotha

Thank you

hell with them all my boy is a trip when we together and he ticks we look at each other and crack up cause i do it sometimes like it rubs off on me . but he is my best friend and i joke with him in fun. i hate haters who like to make people feel shitty cause of something they cannot control

He understands how sound deading works

Surely using closed cell foam on top of something like Dynamat will help you project more of the sound through your speaker instead it escaping through other parts of your door?