Dense Foam That Can Hold Its Shape.

[Trdat]

In Australia I was able to find foam which held its shape and I used it to put within the window seal to help soundproof the window. The foam perfectly fit within the 4 sides nice and snug.

I have called a couple foam outlets however it seems there is no foam they offer that is dense like reconstituted foam that could hold its shape for the purpose of fitting within 4 sides of a window seal, of course just behind the window itself on the inside.

There are a lot of US members here, perhaps there is an outlet where I can purchase foam online that has a super dense foam which will hold its shape for this purpose? The main prupose of fitting snug within all 4 sides and without falling down.

 

[SIY]

In Australia I was able to find foam which held its shape and I used it to put within the window seal to help soundproof the window. The foam perfectly fit within the 4 sides nice and snug.

I have called a couple foam outlets however it seems there is no foam they offer that is dense like reconstituted foam that could hold its shape for the purpose of fitting within 4 sides of a window seal, of course just behind the window itself on the inside.

There are a lot of US members here, perhaps there is an outlet where I can purchase foam online that has a super dense foam which will hold its shape for this purpose? The main prupose of fitting snug within all 4 sides and without falling down.

The first place to check- always- is McMaster-Carr.

 

[izeek]

horsestall mat is about as dense as it gets, i think. don't know if it is applicable to your use case. easily cut with a real sharp knife.

 

[mhardy6647]

@SIY for the win (as they say).
One thought, though, which, albeit peripheral, seems worth mention.
An age-old trick for inexpensive, quick, form-fitting packaging is to use foam-in-place insulation and plastic wrap.
Foam-in-place insulation is messy and a pain to work with, but it can be cut with a knife after it sets and it will fill the space allotted to it.
It is, of course, rather firm when fully cured, which may or may not be appropriate for a given (mis) application.
But, again, it seemed worthy of mention.

image borrowed from www.homedepot.com

 

[Trdat]

horsestall mat is about as dense as it gets, i think. don't know if it is applicable to your use case. easily cut with a real sharp knife.

Not really because its too dense. I need something that will actually squash a little so it can fit snug. The horse stall mats which are essentially gym mats are to rigid, plus I have no indication of there coefficients. At least with dense reconstituted type foam we have some idea.... But nice idea, and it might work so I will look into it. It could possibly have some give on all 4 sides.

 

[Trdat]

@SIY for the win (as they say).
One thought, though, which, albeit peripheral, seems worth mention.
An age-old trick for inexpensive, quick, form-fitting packaging is to use foam-in-place insulation and plastic wrap.
Foam-in-place insulation is messy and a pain to work with, but it can be cut with a knife after it sets and it will fill the space allotted to it.
It is, of course, rather firm when fully cured, which may or may not be appropriate for a given (mis) application.
But, again, it seemed worthy of mention.

image borrowed from www.homedepot.com

Thanks for the idea. My window is actually sealed well plus its a 8mm thick glass with a 20mm air gap and a 4mm glass giving me 38 STC which isnt bad but I am on the bottom floor next to a quiet road but people walk past, I need that extra touch of soundproofing. Cheapest way is my unique idea which has worked before.

Adding a layer of foam with an air gap will give me a touch more soundproofing. I just got to find a dense foam that holds its shape, I know it exists just don't know where.

 

[mhardy6647]

^^^ sounds kind of, sort of like memory foam?

 

[Pareto Pragmatic]

^^^ sounds kind of, sort of like memory foam?

Depends, but memory foam tends to sag under it's own weight.

What is needed is something with a high ILD rating, that's how much pressure it takes to compress 25%. Higher ILD makes it less likely to sag and create gaps under it's own weight.

Density ratings are how much material will be present in 1 cubic foot (in the usa) of material, basically how much it weighs. High density low ILD will definitely sag, since it would be heavy but not very stiff. Memory foams, I think, are usually high density but low ILD.

To source this stuff, google ... upholstery foam specifications ... (that last term gets you sites that list specs). I've never used foamonline.com, but it exists, as do other sites. There is a huge variety of foams used in upholstery, and specs are commonly provided, so a good type of place to look for foams.

 

[izeek]

Not really because its too dense. I need something that will actually squash a little so it can fit snug. The horse stall mats which are essentially gym mats are to rigid, plus I have no indication of there coefficients. At least with dense reconstituted type foam we have some idea.... But nice idea, and it might work so I will look into it. It could possibly have some give on all 4 sides.

yea. i wasn't sure if it was what you were looking for. i use it as part of speaker decoupling exactly because of it's density.

 

[OldHvyMec]

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    M-D Expandable Foam Weatherstrip
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    Lowe's & more
    Free delivery on $45+

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