Hey has anyone used spray on dyna mat before. If so, how well does it work at stopping rattles and such. Is it really easy to apply, just spray it on right?

 

wut the?... i dunno man, it doesnt sound liek it would work... i duno though, dynomat is thick thats how it stops vibration, iono how a spray on version can work as well though =\

 

I've tried it, but didnt like it much. I'm sure if you use a couple of coats it would work great, but it is fairly expensive to use that much. The only place I would really use it is somewhere u cant put Dynamat sheet.

Also it takes forever to dry.

 

I've used stinger's roadkill spray - it's ok. The way that sounddeadening works is by adding mass to the panel - not thickness.

The spray doesn't add that much mass in one shot, so it's ok for hard to reach, but I would use matt where you can.

 

What would you guys suggest to use on the inside of panels(the plastic part not the metal door frame). I've already installed fatmat on the metal door frame and can still hear a little rattling from the panel. If you look at the inside of the panel you will see that it isn't really flat so it would be hard to install the regular stuff so thats why I was wondering about the spray on. Also why is it a seasonal product?

 

Take eggcrate foam and spray adhesive....glue the foam to the back of the panel, and voila. It's very cheap and works most excellent.

Make sure the foam will not get wet though...like in the doorpanels, make sure the plastic splash guard is fully intact etc.

 

I havnt used the spray Dynamat, but I did line my trunk in a simple rubberized undercoating with Sound Deadening also, and it seems to help out a little with some road noise, but not much help on damping the rattle of bass...not much you can do in that department.

 

I use wheel well undercoating , works as good as dynamat and is alot cheaper, jus be sure to use gloves and a mask.

 

Does it smell??

 

@ first..and then maybe a day or 2...but its not that bad after it drys. I got it @ Mccoys...but they should have sumthin like it @ Home Depot or a Car Supply store. Depending on where your located.

 

How well did it work for vibration dampenng. Were you able to tell a notable difference.

 

it's meant to be applied as the last step, after the dynamat sheets, in order to fill in spaces that the sheets couldn't get. according to "dynamic control university" the dynamat training program, first dynamat extreme, then regular dynamat, then the spray on stuff....it's best used for sound deadening, to block out road noise rather than stopping vibrations.

 

So I already have a layer or two of Fatmat/Peel and Seal throughout my car, would it be wise to put a layer of this spray stuff on. Is there any other good alternative to the spray because the dynamat spray is hard to find? Someone mentioned undercoating would this work well? Also what is the best way to damper a panel, just to stick the Fatmat/dyanmat on that as well?

 

DO NOT USE RUBBERIZED UNDERCOATING

I followed the advice of someone here on H-T that said to use rubberized undercoating...'it's the same thing' etc. Trust me, it is not.

The stuff never fully dries. In the summer if you park your car outside, the stuff starts to re-melt and you can smell it....it's horrible. It's the worst mistake I've ever made on a car in my life....you can never get it back off either. It stays sticky and tacky, smells forever because it never fully dries, and doesn't really help out with the vibration all that much.

A few people might have had success with certain brands of the stuff, but overall, I'd stay as far away as possible from rubberized undercoating as you can. It goes on the bottom of the car for a reason.

Like I already said...for plastic interior panels, use FOAM. It keeps the panel from touching the metal and keeps it nearly completely silent when the bass hits.

 

Thanks for the advice Jon. I know that if my car smelled like that **** I would be pretty dissapointed. When I installed the Fatmat there was a smell for about 2 weeks. I can still kinda smell it(3 weeks later) but I bet a bottle of febreeze would clear that up. Your foam suggestion makes alot of sense. What type of foam would i have to get? Does it need to be pretty firm or soft? You mention eggcrate foam but we don't eat that many eggs so I was wondering if you new of any particular foam at a hardware store. Just out of curiosity what happens if the foam get wet. I don't have my splashgaurd any more but I have fat mat acting as one.

 

if your trying to stop rattles, then like Jonathan_EH said foam is best, by eggcrate foam, he isn't referring to anything used for eggs, it's a packaging foam, and some people like to use it on beds to make them softer, sometimes in hospitals. you should be able to find it @ home depot. It works great for stopping rattles, because it cushions the parts rattling, so for that matter almost any foam of medium density will work, walk around home depot and see what you find
if your trying to elimante road noise, then yes spraying it with a spray-on sound deadening will be helpfull, however it is not always extremely noticable, especially since you have already done so much sound deadening.
Jonathan_EH is also right about the undercoating, most rustproofing undercoatings are designed not to dry, you may be able to find a spray-on "sound-sheilding undercoating" at an auto-parts store, the most important thing to make sure is that it dries, and that it dries hard. but you do still run the risk of an odor returning during high-heat summer days.
stop by your local car audio shop (not a best buy or circuit city, but a specialist) they should have some form of spray wether made by dynamat, cascade, stinger roadkill, or even rockford fosgate.....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pbcdb &raquo;</TD></TR><TR><TD CLASS="quote">Thanks for the advice Jon. I know that if my car smelled like that **** I would be pretty dissapointed. When I installed the Fatmat there was a smell for about 2 weeks. I can still kinda smell it(3 weeks later) but I bet a bottle of febreeze would clear that up. </TD></TR></TABLE>

Febreeze probably won't take the smell out if it lingers. Febreeze generally works by removing a smell that is saturated in a type of fabric..whether it be cloth seats or carpet. The smell in your car is saturated in the product itself, and Febreeze will probably do little to none (other than masking it) as far as actually removing the smell.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pbcdb &raquo;</TD></TR><TR><TD CLASS="quote">
Your foam suggestion makes alot of sense. What type of foam would i have to get? Does it need to be pretty firm or soft? You mention eggcrate foam but we don't eat that many eggs so I was wondering if you new of any particular foam at a hardware store. Just out of curiosity what happens if the foam get wet. I don't have my splashgaurd any more but I have fat mat acting as one.</TD></TR></TABLE>

You can buy the foam at lots of places like foz said. The stuff I use I just buy from Wal Mart .....it's the stuff you put down on a mattress to make it more plush. It's called eggcrate foam because it looks like the bottom of the cardboard boxes eggs come in. I'm sure you've seen the stuff. If you haven't, just go look in Wal Mart or a place that sells mattress sheets/pillows/comforters. It's easy to find.

Just cut it to the appropriate size, and then use spray adhesive to attach it to the back of your interior panels. It works very well in car audio environments by keeping the plastic from clapping against the metal when the bass hits. It's essentially nothing more than a cushion.

If you would like, I'll take pics of how I did it in my car and post them up for you.

If you do decide to use a spray on dampening product, follow foz's advice.

 

Hey thanks for the advice guys. The reason I said Febreeze will probably clear it up is because my interior soaks up smell and hold it for a rather long time. The smell usually stays in for like a week. Whenever I let someone smoke in my car I can still smell the cig for like a week so I think the smell is proabably soaked in the fabric. I also called fatmat and they assured me that the smell would go away. On another note fatmat smell 10 times worse then Peel and seal does. Anyways thanks for the advice, really thanks I hate rattle.