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Old 07-10-2010, 05:16 AM   #1
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Seal Gap Between Drywall Ceiling and Recessed Lighting Can


Greetings,

I am going to be sealing up my attic and need advice on how to seal the gap around the rim of my recessed lighting cans and the ceiling drywall below. I thought of using great stuff but it's website indicates it should not be used around lighting fixtures. I have installed 9 Halo Air-Tight Recessed Cans. Should I use a caulk, if so what kind?

Thanks

Alex
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Old 07-10-2010, 05:18 AM   #2
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Seal Gap Between Drywall Ceiling and Recessed Lighting Can Rim


2 threads on same issue merged
Please only start one thread
Thanks
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Old 07-10-2010, 06:04 AM   #3
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Something like DAP siliconized latex should work, but the interior trim piece should provide the needed seal, unless the hole was way too big.
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Old 07-10-2010, 06:17 AM   #4
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Any specific kind of silicone latex caulk, temp rating?

Thanks
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Old 07-10-2010, 06:23 AM   #5
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If they are Air-Tite cans no sealant is necessary. They already have a foam ring gasket around the hole.
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Old 07-10-2010, 07:20 AM   #6
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This is a 1/8" gap between the drywall mud and the can. I don't see a gasket.
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Old 07-10-2010, 07:22 AM   #7
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Is the can itself free of unused screw holes, slots for adjusting of the lamp position, etc? If not, then you need not bother sealing around the rim.

Even with an incandescent lamp in the can, the rim does not get that hot. Most of the heat is at the other (high) end of the can.
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Last edited by AllanJ; 07-10-2010 at 07:27 AM.
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Old 07-10-2010, 07:26 AM   #8
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Quote:
Originally Posted by albasaurus View Post
This is a 1/8" gap between the drywall mud and the can. I don't see a gasket.
Then mud the gap to be Code Compliant.
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Old 07-10-2010, 07:27 AM   #9
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The gasket is between the frame and the back side of the sheetrock.
If there is no gasket then it is not an Air-Tite can.
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