i lined it on the inside, under the factory stuff. makes everything a tight fit but it'll work. if you wanted to do the engine bay id use the thicker fiberglass/foil stuff on the firewall/hood, and the foil/foam on the inside of the fenders/wells.

I'll keep my eyes open and start looking for something we can use to silence motor noise. In the meantime, I guess I'll line the inside of my firewall the same as you did. Grumble grumble. I really don't want to take my dash out, but I suppose the end result is worth the work.

look at your lexus && try to copy what they did

For those who did use the homedepot insulation...how was the difference? greatly improved or still noisy? how many layers you guys go for?

Edit: i have already put b-quiet sound proof layer almost all around and on the back seat to the trunk..if i use this frost king, is that too much layers? and will this raise the carpet up too high?

This post has been edited by chacha: Jan 31, 2011 - 2:03 PM

i have 1/2 inch carpet padding & frost king under my carpet and its about as thick as u want it

This post has been edited by stephen_lee: Jan 31, 2011 - 2:05 PM

great improvement?

hmm...i guess i won't know until i try, what do i got to lose anyways...i have already got the sound deaden and on my note....don't buy ultimate B-Quiet sound deaden because i felt my car sounded louder especially on at high speed...my ears hurt...i feel like i just trapped all the noise vibration inside the car.

This post has been edited by chacha: Jan 31, 2011 - 2:07 PM

ya the foam def deadened out the sound in the car, road noise and all

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That's very possible. The Frost King foam insulation absorbs the vibrations, deadening the sound. However, sound 'dampening' will keep sounds inside the car. It's designed to bounce vibrations back, not absorb them. That's why the Frost King and foam carpet padding work so well.

Stephen- it looks like Lexus lined the outside of my firewall with the same stuff they line the underside of the hood with. If the Frost King wasn't silver, I'd definitely have my firewall lined. But I lived for 4 years in a Celica with no engine noise silencing, so I'm sure anything I do will be an improvement. I'll line the inside of the firewall for now and get the car running, then I'll go from there to see what else I need to do.

Hmmmm i may have to get some of this stuff soon, with as stiff as my suspension is everything is rattling

update for those who have done this upgrade in padding?

ooo question! Is there any sound insulation on a stock 99 Celica GT??

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The padding helps. Adds a lot of weight, but it helps. The biggest sound reduction I got with the padding was when I lined the rear quarter panels in the trunk and when I lined the inside of the interior plastics. I found that lining my interior plastics/door panels was more effective than gluing the padding to the sheet metal.


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Yes, your '99 has the felt under the carpets and lining certain places on the interior plastics. The '96+ also had these white plastic box-looking things attached to the rear speakers that were supposed to cancel noise.

This post has been edited by richee3: Feb 14, 2011 - 3:14 AM

getting a little warmer, guess ill start opening her up soon for the project ground up to roof. many thanks; got a picture of the lining in the trunk

hmmm.... i've done these steps, but instead of adding stuff, i removed every last trace of the factory stuff including shaving it off the bottom of the carpet.

hmmm.... i also have polyurethane engine mount bushes.

but i do have a very tidy interior .... and 1000 rattles.

when i packed it all up in a rubbish sack it weighed 8kg on the scales

okk i'll have to check it out! thanks a lot

Insulated my roof today. To answer my question from much earlier in this thread, Frost King will fit just fine in a Celica with a moonroof. There isn't a lot of space for it, so I feel like noise cancellation might be minimal, but every little bit helps. All that I have left to do is the firewall and then I'll have every conceivable square inch of my sheet metal lined with Frost King. I'll post pictures of the insulated firewall when I get around to doing that.

how'd you get the top roof part off like that? i know the four clips in the back, but damn it was hard to pull out....

after a while, when i installed my new carpet i threw away the padding. I feel no difference whatsoever..

now the frost thing might work better. because looks like it wont absorb moisture.. my padding did when i had the leak.

im going to stuff my quarterpanels with fiberglass insulation this weekend, ill let ya guys know if it helps much (i think it'll help a lot)

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The roof lining is easy. Pop those clips out, but then you have to take the plastic trim loose on the sides of the car. Take your sun visors out (two screws for the visor, one for the visor clip, then pull the clip straight down.) Take your rearview mirror down (pop the piece of plastic off of the back using a flathead screwdriver, then two screws to remove the mirror. The plastic piece is hard to pop off. I've put several dents in mine trying to take it off.) After you've loosened the plastic trim and taken the mirror/visors off. you can pull the head liner straight out the back of your hatch. It's a tight squeeze to get it out of a coupe though. Mine is still halfway off because I had other arrangements come up when I was doing the insulation, so you can PM me and I can send you full step-by-step pictures if you like.

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The Frost King is an open-cell foam so it does absorb water. However, it doesn't hold it like the padding will, and you can buy some tape to tape the edges of the Frost King to prevent water from getting soaked up.

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I considered that. There would be absolutely no sound inside the car. But I decided I didn't want fiberglass dust floating around inside the car, which is bound to happen even in minute amounts. If I did do the fiberglass insulation, I would take a hint from the doors and the plastic weather lining. I would put the fiberglass insulation in then cover the quarter panels with plastic lining so no dust could get inside the car.

think using duct tape to tape the foil onto the base/sheet metal would have any negative effect on the foam?

No. But use the tape only as a way to seal out moisture and hold the edges. I'd use done kind of glue still

well I am using rubber cement to stick it to bare metal/plastic/wood. and than duct taping the edge and small/loose pieces together to prevent it falling off or leaking just to be sure =D

this is what i did

You'll have to let us know how well that works. I'm under the impression that FrostKing works best if the foam side is towards the sound, but I noticed when I did the sound insulation with the foam carpet padding that lining my door card was much more effective than lining my sheet metal.

I just signed up to test out a new sound insulation called GTMat. They're sending me 10 sq ft for free, which should be enough to do the floor of my trunk. GTMat is a new company and they're wanting help getting started so they're asking for reviews. So far, they seem to be rated pretty well. The price is way better than Dynamat. If it works out, I'll be buying plenty more to insulate the engine bay and replace all the Frost King I have now. I'll let you guys know how it works out.

http://www.amazon.com/s/ref=nb_sb_noss_1?u...-keywords=GTMat

how to get some free product...let me know, i want the try outs

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Reading the description of the material, it won't serve the same purpose as the Frost King. The foam-and-foil of the Frost King is meant to absorb and block sound waves from outside, while dampeners vibrations within the panel itself. There's some crossover, of course, but they're not substitutes.

Frost King and any constrained layer damper cannot be compared. They both serve different purposes.


CLD's main use is weighing down panels (adding mass) to reduce resonance cause by vibrations (bass, for example). As an added bonus, it slightly reduces noise trying to go through it. However, it neither absorbs it nor deflects it fully.

Frost King seems to be a sandwich of adhesive, open-cell foam and foil (not exactly sure what material this "foil" is made of), but it seems comparable to the foam used to absorb noise in sound rooms (they used open-cell foam just like Frost King, but in varying thicknesses i.e. the thicker the better, but the more space it takes and the more weight it adds)

The foil seems to do the insulation magic, while the foam just absorbs moisture, noise and some vibration. If I was to do a comparison from what I assume this product is,

*using CLD to reduce noise is like using Frost King to reduce vibration.


That said, I believe that the composition of the product would allow it to reduce noise even if slightly, and it would be most effective if used in conjunction with other products (specifically MLV and the padding that the Original Post shows). I'd like to do this to my Celica, as a day's worth of driving in it in different road conditions (except rain) was rather irritating (mine's a 94...) I have 17" wheels with worn tires and a bad wheel bearing, so you can guess how irritating it was today.


My plan will be: Tape Frost King as a base for lying down the other products. I'd have to clean everything with at least mineral spirits or wax and grease remover for proper adhesion of the tape (especially on vertical surfaces like door panels), and using duct tape to seal the seams and edges.

After taping Frost King, I plan on spraying on some 3M 90 spray adhesive and sticking on layers of the carpet padding for the vertical surfaces. MLV shouldn't be used on vertical surfaces through adhesion, it should be riveted, for example, instead. You should be working with 1lb/ft MLV for best results, so putting all that Frost King and adding MLV on top would make the doors kind of heavy, for example.


So for the doors and vertical sections I want to use carpet padding. For the floor however I want to use MLV, sticking it onto the frost king with some adhesive so that it doesn't shift when moving your feet, items on the floor, etc.

I should get very noticeable results from doing all of this, and stripping out the Celica's interior isn't too hard. Hopefully that'll be next weekend's project if the body work I plan on doing leaves me with some cash on hand. I've already purchased two rolls of 24''x15ft Frost King to start putting on the doors and panels, and the hatch floor. I hope to see good results from just that, as everyone seems to obtain.

Would it not be better to apply the mass loading material directly to the panels, as the point is to increase their mass and thus reduce the frequency of their vibrations to inaudibility?

Laying the Frost King down first would decouple the dampening material from the panel it's meant to dampen, assuming that the mass loading material doesn't compress the foil to the point where it is unable to function.

The open-cell foam is sound insulation, taking advantage of the inefficiency in sound transmission when soundwaves cross multiple different densities (the open cells force the wave to transition from foam to air to foam repeatedly). The aluminum foil backing is intended to help reflect sound which makes it through the foam.

The other point to be aware of is that the Frost King has a strong adhesive already applied to the foam side. I used aluminum tape for the seams to make them less prone to damage but it wasn't necessary for proper adhesion.

This post has been edited by Galcobar: Aug 19, 2012 - 3:08 PM

I ended up finishing the Celica's trunk in Frost King this morning, and I'll add some to the roof later. I'm putting the GTMat in my 350Z, specifically on the rear fenders. The GTMat looks like it will be a good substitute for Dynamat Xtreme, so I may end up buying some to line my firewall and the underside of my hood with. I really enjoy a quiet car, to say the least.

Syaoran- The carpet padding in the doors is a bit of overkill and adds a decent amount of weight. I have had both Frost King and the carpet padding in my doors at one point and I couldn't hear any difference at all when I took the carpet padding out. Then again, I have a '98 that had some extra sound insulation from the factory and that might make a difference. Under my carpet, I just have Frost King, and that made a big difference. The biggest difference, however, came from lining my rear fender wells and quarter panels with Frost King. Since the fender wells are inside the car in a Celica, you get quite a big of noise from those. Covering the fenders both in the trunk and by the back seats with Frost King cut out the biggest part of my noise, followed by lining the floorboards, then the doors. I currently do not have my firewall or roof lined with anything, but the rest of the body panels in my interior are lined. I'll be curious to see your results.

This post has been edited by richee3: Aug 19, 2012 - 12:00 PM