Under floor insulation? - case in point

Hey guys. Did a search and didn't see much... Maybe someone can offer a suggestion.

Floors in my Model A will be painted, no carpet or fluffy interior panels. The front half of the floors and transmission tunnel are removable. I have exhaust running under the floor, through the frame.

I bought a bed liner kit to do the under side of the body (as recommended by a couple reputable builders) but I'm thinking that alone will not be enough for noise and heat. I was thinking of Dynamat or something similar intended for heat AND sound deadening, and then the bed liner over THAT to cover it and protect if from road debris and what not.

Thoughts? Experience? Bed liner enough, or go the extra mile?

 

Lizard SKin on the (underside) floor with paint or bed liner on top of that. Or you could paint your top floors with lizard skin and then just pain over it with your color of choice. Lizard skin has a thermo barrier and a lot of high end builds use to insulate their car.

You could buy a 2.5 gallon jug of that and forget the other insulation.

 

Yup that's what I would suggest as well. I wouldn't run dynamat etc underneath as chances are somewhere down the road it will come loose and stuff will get underneath it and a mess will ensue.

 

http://www.lizardskin.com/car-ceramic-insulation.html

They say a 30º difference between the surface skin temp and the inside of your car. Might be worth it dude especially since your interior is so spartan like

 

I think I'm gonna do my '33 with Lizard skin since I don'e want upholstery really in that car and I don't want to see the silver backed insulation. It's expensive but it's worth it here in NC where we see 30 straight days over 90º in row.

 

We've used Lizardskin with great success. I plan on using it on my personal tudor with a wooden floor. The only thing I'm not sure about is the addition of their soundproofing. The mats, in my opinion, are just too bulky.

 

I've heard GREAT stuff about the Lizard Skin. Heard of lots of people using it with great success. Maybe I'll get both the sounds and heat coating they offer.

Does their insulation offer any sound deadening properties or should BOTH really be used? Do you HAVE to use their gun or can I use one I have? How durable is this stuff? Could I use the heat insulator on the bottom side and then the sound deadener on the INSIDE of the floor and expect it to hold up??

Any Alliance Vendors sell this stuff??

 

^ I have all the same questions.

 

Okay... I just called the rep for Lizard Skin and asked away!

BOTH products can be applied under the floor. AND! It can be top coated with whatever you would like. Good stuff! It does appear to be a little pricey though.

I'm thinking of using BOTH products. It is textured when it dries. So, I'm thinking about using Ceramic formula under the car and top it with the bed liner. THEN use the sound control stuff inside and top coat it with the color I've chosen for the inside.

It has to be applied over primer (ideally epoxy) and is fine over any seam sealer as long as it's not a silicone based product (which obviously doesn't groove with paint very well, anyway).

It does appear THEIR sprayer is the ideal thing to use.

So that's what I learned. They're sending me samples of the stuff on metal.

So... Has anyone used Lizard Skin on the bottom of their car? If so, please share your experience!

Thanks guys! So... any alliance vendors?? This stuff gets kind of pricey! UHG!

 

Some videos on applying it. Off-topic car, but good information.

http://www.youtube.com/watch?v=aUN61EzFaRA

A follow up later in this video...

http://www.youtube.com/watch?v=HBLg94B0vpY&feature=related

 

i use this foil tape from hope depot. comes in a roll about 6" wide, and has a sticky tar backing.... its like dynamat extreme. its super cheap, and insulates AWESOME.

do NOT use duracoat bedliner you buy at vatozone. junk.
scrape with 36 grit, wipe down with MEK, and use a texture gun to spray it. i used to do them in truck beds.

 

I didn't read through the whole thread but if you are interested here is a thread about alternatives to Lizard Skin:

http://www.hotrodders.com/forum/alternative-lizard-skin-103610.html

 

Thanks K13! I'll check it out!

In the mean time, is anyone using JUST the ceramic stuff?? The rep says it doesn't offer very much sound control, but the videos I linked to above sort of give a somewhat un-biased approach to applying it and they say it really cuts down on the resonance. It appears that if I want to do both, it's going to end up costing about $400 with the gun by the time it's all shipped to my door. DAAAAAMN!!! That's a lot of money!! I could do just the ceramic coating Lizard Skin for about $100 less, or more.

 

I would think just about any thicker product (Lizard skin, bed liner etc)would cut down on resonance as the metal wouldn't be able to vibrate as much with it applied but the problem would probably be that it doesn't cut down on noise actually penetrating through into the body.

 

Not to throw fuel on the fire, but I just recently heard of Boom Mat. I has all kinds of products and they claim thermo and sound deadening protection all in one product. To top it off, you can get it in a bombcan, rattlecan, aerosol spray can, whatever you want to call it. It was recently used on a project on Powerblock and it seems to be a very good product. I am looking into getting some for my project shortly, will let you know how it works out.

 

A buddy hand brushed lizard on the floors of his 40 Ford pick-up. He wasn't too particular since it would be covered with carpet. It looked like a good enough job even though it wasnt sprayed with a fancy gun.

 

if its going under carpet- seriously the aluminum tar tape at home depot is the way to go. cheap and stupid effective

 

No carpet.

 

X2 on the Peel & Seal from Lowe's or the Depot. Great stuff, inexpensive and easy to apply

 

I don't think my method will catch on. I don't have a clue what it will do but it was free and I have a shit load of it. a trucking company dismantled a couple of refridgerator trailers, a 1/4 vinyl sandwiched between two thin aluminum skins. my 54 GMC has a flat floor and it will have carpet on top.
I feel it will not only be cool and quiet it was also free.

 

Herculiner from Ace Hardware works very good for sound deadening costs about $65. per gallon. Used the Home Depot foil tar tape and it's cheap and works good.

CRUISER

 

I just sprayed lizard skin in a car last friday. i did both the sound and insulation, not cheap but i'm thinking this is the answer

 

Here is a product that can be mixed with any paint .Might be able to mix with the 2 part bed line kit sold by SPI and have both the insulation and wearability of bed liner.
Here's the link http://www.hytechsales.com/insulating_paint_additives.html

 

scootermcrad -

Heat Insulator? ... Sound Deadener? ... Are you building a HOT ROD? ... or a Street Rod?

All joking aside, I've heard nothing but good stuff about the LizardSkin® products.

 

Hardy har har! I actually figured a comment like that would come earlier...

My wife has a cochlear implant (you can read more when Wiki comes back up: http://en.wikipedia.org/wiki/Cochlear_implant) in her right ear and the processor portion is really sensitive. I'm trying to reduce the noise level inside as much as I can so she can comfortably ride with me. The car is going to be loud, there's no doubt about that, but it's the resonance that will cause problems, not so much the actually engine/exhaust. So it's worth it to me to invest a little more to do this right.

I'm really leaning towards the Lizard Skin and a buddy of mine offered to let me use his spray gun kit to do the job. Looking at the time frame I'm going to have to do this in and the type of work that I had planned on doing, the LS seems the best solution for my particular application. Especially with the way the floor is put together and attached to the sub-floor structure. And I'm actually considering spraying just the inside floor and top coating it instead of the bottom if it will hold up to the constant movement of feet sliding around on it.

Thanks for all your input guys! I'll keep you posted on what I end up doing.

 

before you use the spray gun- spray it down with PAM, or nonstick butter spray. leave the shit in the sprayer cup, it will peel right out when it dries.

at least thats what i did with my texture gun and bedlining when i did it for a while.

 

Ya know, you could make your floor like a sandwich. Plywood, sound

deadener/insulation, then plywood. Paint the top, and use the Lizard Skin,

or what ever on the bottom. As a suggestion, use CDX A/B ply, but for

the bottom I'd use marine plywood. Just a thought.

 

As has been said many times already, Lizardskin is a very effective heat barrier coating. That said, we all like to save some cash too so if you are looking to cut your cost on this project without cutting the quality...make your own Lizardskin. There is a lot of info about this on the net but essentially you will need ceramic microspheres and a gallon of good quality exterior grade latex paint. I bought a pound of these spheres for $8.95...when mixed with a gallon of $16 paint you get almost two gallons of "lizardskin" for about $25...now that's some savings!
http://www.wicksaircraft.com/catalog/product_detail.php/pid=4243~subid=8457/index.html
As for the "fancy gun"...it's just a Shutz gun with a larger cup.

 

I used Lizard Skin on the floors of my 72 Chevy K20. What I liked about it is that it gets in every little nook and cranny, which I dont think any kind of stick on matting does quite as well. Laid my stock rubber floor mats down over the top and it works great.

I know if I was doing a frame off type build where you had access to the bottom I would use it underneath for sure. Super good coverage for every little crack, and if you drive your car out to Bonneville that's a good thing. It is tough as nails, and you can paint over it body color if you want.

 

Sort of on a tangent, I need to order a non-silicone based seam sealer. I'm a big fan of 3M products. Which one do you guys like? I'm thinking a squeeze tube over a brush-on type might be better because of a couple gaps I want to fill. Tell me what you guys like!