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Void Filling Foam? [message #21556]

Sat, 03 June 2006 16:18

Skip
Messages: 27
Registered: May 2009

Chancellor

I'm finishing a pair of Lowther Medallion II cabinets, which have
moderately large voids in the upper and lower backs of the cabs.
What kind of squirt/pour-in foam should I use here. It should expand
a lot, and yet not exert a lot of pressure on the ply panels. I don't
think it needs to be dense.

Your thoughts are most welcome.

Thanks,

Skip

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Re: Void Filling Foam? [message #21557 is a reply to message #21556]

Sat, 03 June 2006 22:12

Scorey
Messages: 1
Registered: May 2009

Esquire

This past winter I used some sealing foam from Dow Chemical that I bought at Home Depot called "Great Stuff." Worked real well, sealed real well and was sandable to boot.

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Re: Void Filling Foam? [message #21559 is a reply to message #21557]

Sun, 04 June 2006 11:29

Wayne Parham
Messages: 18786
Registered: January 2001

Illuminati (33rd Degree)

Be careful when filling. It expands enough that it will easily split the wood if you overfill.

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Re: Void Filling Foam? [message #21561 is a reply to message #21559]

Sun, 04 June 2006 19:22

Skip
Messages: 27
Registered: May 2009

Chancellor

Thanks for the info. I looked at Great Stuff on the
product web site. I sounds like you would want put a small
amount into the speaker, let it cure and then add some more.
Sounds like you get a better cure, and avoid over pressuring
the wood.

Skip

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Re: Void Filling Foam? [message #21563 is a reply to message #21561]

Mon, 05 June 2006 05:44

gfederys
Messages: 46
Registered: May 2009

Baron

Per recommendation on this forum, I just filled voids on a pair of Loather Fidellio's with "Great Stuff" for "Windows and Doors" from Dow. This one doesn't expand as severly as some of the others and is guarenteed NOT to bend the frames of windows and doors. My cabinets were already built, so I drilled 2 5/8 inch hole, one to spray and one for viewing. It worked great, just follow the directions on the can. After it cured, the cabinets didn't ring as much when I did the "knock on wood" test.

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Re: Void Filling Foam? [message #21566 is a reply to message #21561]

Mon, 05 June 2006 09:45

GarMan
Messages: 960
Registered: May 2009

Illuminati (2nd Degree)

Hey Skip,

A bit of pressure on your panels is actually good. It pre-loads the cabinet to minimize resonance. But like you said, not so much that it splits the wood.

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Thanks All [message #21570 is a reply to message #21556]

Mon, 05 June 2006 19:25

Skip
Messages: 27
Registered: May 2009

Chancellor

I've gotten a lot of good advice including an email
waring from Ed Schilling of the HorneShoppe. He pointed
out that there can be a lot of splatter from Great Stuff,
splatter that can do serious harm to an eyeball. I
appreciate the help.

Skip

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