DynaMat anyone use it?

[94ToyBear]

Anyone used Dynamat here?
Allways wanted to dampen the sound and keep the heat in and the cold out.
Is it worth it?
Worth it on the topper its self?
I have a YJ and its supper loud from road noise, and man it takes forever to warm the cab up, even with the k5 blazer fan up grade.

[Spieg]

I've used it in the past, and found it to be pretty effective for noise abatement. No idea how it works for temperature control but it can't hurt. I don't think I would use it in my Jeep due to the amount of water and mud that could get trapped in the nooks and crannies under the mat (rust).

I have basically the same heater in my CJ that you have in your YJ (even have the blazer blower motor swap), and my Jeep gets hot like a sauna even with a soft top. Have you replaced the heater core? How's your thermostat set? Might also look at heated seat covers (almost instant heat).

[96EXXLTinCO]

I don't believe that stuff would do much to insulate, Brian is right about the sound deadening though. I've been wanting to do this in my Explorer with the sound system in it, and to help with road noise. I've never got to personally experience the difference in the noise reduction, but I know of a few people who swear by it. The actual Dynamat product is pretty pricey, but I've seen youtube videos of guys using some kind of material from home improvement stores that is apparently almost the exact same thing and achieving the same results. Basically it reduces and/or eliminates any noise causing vibrations in the metal of the car. Think along the lines of hitting a drum cymbal and what it sounds like, now hold the cymbal with one hand and hit it again. Same principal. Another product you could look into is called lizard skin and is a spray on application. Their site is here: http://www.lizardskin.com/

[94ToyBear]

One thing that drove me away is the potential rust.
My cab can get hot...but only after being ran for at 30 minutes with out opening the doors.
Heater core is new, heater box is sealed, cowel vent is pluged, stat is set for 205-210 (99 Cherokee 4.0 engine swap)

[EKXJ87]

On my XJ I seem to have quite a bit if heat coming from the fire wall even though I installed the OEM thermal padding and I run with out a headliner. I did paint the roof with but with the next build I'm looking into some sort of spray on insulator like lizard skin which seems cheaper then the dyna-mat both of which I've not had any experienced with. Although I been researching this product to to maybe try as a price seem reasonable .
hytechsales

[Bob]

I got the Hothead Headliner for my TJ, with their optional sound deadening material similar to Dynamat. Noticeably quieter and my head doesn't get hot and cold anymore!

I haven't used the deadening material on any other body panels, though they sell it.

[dieseldoc]

Dynomaye is Heavy stuff. It works well. It won't help your heat Issues.
It has a foil linning on the back(cab side) to help keep the heat to the outside.
For what you are trying to achieve I think the lizard skin spray seems to be a good product.
Steve is researching another product.
Fallow along there as he researches thing heavly before spending on something.

[Spieg]

Noticeably quieter and my head doesn't get hot and cold anymore! Don't think you should wear it on your head, but if you do - be sure to cut some holes to see and breath out of (safety first! :D)

[moose]

I have used all of FatMats products on my street/strip hot rod. FatMat is a direct competitor of DynoMat and is essentily the exact same thing, but cheaper (this was circa 2012).
As for rust, if you apply it right this is not an issue. Anyone who has had to remove properly installed sound dampener should be able to back me up in that the sticky black stuff adheres to metal very well. Use a good heat gun and a solid roller. Your entire arm will be sore from rolling and applying pressure if you're doing it right. Additionally, I also used spray on Rhino Liner after the fact to help seal up the cracks between sheets. I had purchased a solid roll and custom cut it to coat the entire inside floor pan, making sure to overlap the edges. This is not neccesary and is overkill. Only 1/3 of the surface area is required to be covered for effective sound dampening.
The black sticky side is basically "roofing tar sheets" (the actual term escapes me at the moment) and many on the low budget side use the stuff they get from Home Depot, Lowes, etc...the MAJOR drawback to this is the smell. It will dissipate, but will take months for it to be bearable.

Brandon is correct about the stuff being HEAVY. When I was ready to address the roof of my car, FatMat had come out with a material that was lighter than their original product and the sticky stuff is white. I actually have some of this leftover if you want to check it out. I would recommend this over tradtional DynoMat because of the weight savings. If you just want to apply a sheet here and there (which is ideal to save money and weight), seal the edges with a strong epoxy to prevent water/mud/etc from sneaking underneath.

As for heat, FatMat makes a polyurethane liner to keep the heat on the engine bay side of the firewall. It works but is HEAVY, the stuff was around 3/8" thick (based on my memory). However, you don't have a big block in your Jeep, and in my opinion you would be better off using just aluminum tape/adhesive sheeting on the engine side of the body to reflect heat. Haven't heard of Lizard Skin before and will be researching that stuff.

So, in conclusion, use it for sound dampening, but I would look elsewhere for heat protection.

[moose]

Just re-read and realized that you want to insulate your YJ. I would still not use a FatMat/DynoMat product for this.

[Patrolman]

I am going to do something similar in my 86 Custom Cab. There is a lot of road noise, and it gets hot in the Summer. I found this thread online for hot-rod guys who had a big discussion about it. Most agreed that for the price it was worth getting the stuff from Lowes. I only read the 1st couple pages though.

http://www.jalopyjournal.com/forum/threads/screw-dynamat-peel-and-seel-great-sound-dampening-material.711889/

[ExplorerTom]

The Home Depot stuff is call "peel n seal". I've used it. There wasn't any smell that I remember. When I used it over the muffler that got hot, it melted it- just made that butyl rubber "flow".

[moose]

Most agreed that for the price it was worth getting the stuff from Lowes.

Price is right, but the smell and vapors are present for months. If you go this route, install when the vehicle is expected to have lots of downtime.

Not trying to deter you, just giving a heads up.

[moose]

The Home Depot stuff is call "peel n seal". I've used it. There wasn't any smell that I remember. When I used it over the muffler that got hot, it melted it- just made that butyl rubber "flow".

Perhaps we have experience with different products. The stuff my buddy used was made for roofing and smelt like tar. If "peel n seal" has no odor than I say go for it.

[Patrolman]

Most of the folks in the link I attached did not have a smell. Personally, I would stuff my nose into the package at the package and take a good whiff. Would do the same when I open it up before I use it.

[dieseldoc]

Talk to Evan(synergyxj) about the roofing paper type stuff.
He did this in his Xj.....he had big issues removing it. It burn nicely as well so keep away from heat.
And as mentioned it's a royal pain in the bum to get back out.
Evan almost had fires when he was modifing his rig.....

[94ToyBear]

Wow ! Thanks for all the advice everyone !
I will be looking in to o
All these options !

[Daubut]

I used the Fat Mat product on my JK. I lined the firewalls of both foot wells floor pans and took my front doors apart and lined the inside of them with it as well.

The Fat Mat was cheaper than Dynomat and I think it actually is easier to work with. I used alcohol to clean everything really good and used a laminate floor roller I had to press it down firmly. I installed it in the middle of summer so the warmer weather helped, didn't need a heat gun.

My doors don't sound all flimsy and drum like now when you shut them, and it dropped the heat transfer through the firewall and floor pans during those long summer trail rides or sitting and waiting in line. Not to mention the sound control of the road noise and engine sounds in cab.

I highly recommend it.

[Brian]

I just used this on my 2000 Cherokee before replacing the carpet. Easy to use and self adhesive. It's been about a month and I only have a very slight odor that has gotten less since initial install. Over all I'm happy with the result for heat shielding and noise reduction.

http://www.homedepot.com/p/USEAL-USA-Band-6-in-Aluminum-Foil-Self-Adhesive-Repair-Tape-8872AF6/202086180?MERCH=REC-_-NavPLPHorizontal1_rr-_-NA-_-202086180-_-N

[The StRanger]

Iv heard good things about HVAC insulation, Controls heat more that sound but a lit cheaper than Dynamat..

[94ToyBear]

Im gona look in to this for sure ! Thanks !

[dieseldoc]

Duct insulation works nice.
It will suppress some sound.
Easy to work with just don't touch bare handled.....itchy

[Java]

I keep a bit of something similar, Protecto-Wrap in my tire kit. It's used for sealing up doorways and window openings in construction, I've used it to boot a sidewall and seal a cracked housing. Really useful stuff and cheap, 50' is about $12.00. It's got a plastic backing, not metal.