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Posted

I was thinking of using some great stuff expanding foam to seal some gaps around a wall. What is the correct type of foam to get? I went to the hardware store and they have like 20 different versions of foam. Windows and doors, low expansion, great stuff pro, cracks, flexable and so on. gaps are about 3-4 inches need to seal up and the extra reinforcment wouldnt hurt

Posted

depends how large the gaps you need to fill are...since you said its 3-4 inches i would get the large gap filler (black can) thats what i used throughout my whole build

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Posted
Does Great Stuff warp body panels?
This is what I want to know

it didn't mine but if it gets some where and cant expand or escape it could damage panels but very unlikely

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Posted (edited)

Are you trying to seal or fill in gaps to keep flex and noise at minimum?

Since the gap is that large and if youre only trying to seal, fiberglass would be better IMO.

But if you just filling gaps to keep vibration or port flex so and on for you wall. Black can great stuff or layers of the regular can, if its in one small area.

With 1 inch can, red/ yellow, I fill small areas that were about 3 inch gaps,

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Posted

Thanks, Do you know if you have to use the whole can at once? somone told me you do but I can not remember. and yeah im just filling it in for vibration/seal i will be making small mdf trim peices afterwards, thats gonna be "fun"

Posted

yeah you have to use the whole can in 1 session. once you start feeding the foam through the plastic nozzle, if you leave it alone to set for a while, it'll get hard and you cant use it anymore.

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