Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Is Silicone Sealant Safe for Mashtun repair?
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Old 05-03-2007, 06:36 PM   #1
Airetime
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Default Is Silicone Sealant Safe for Mashtun repair?

I use an older Coleman Ice chest for a Mashtun and I have developed a crack in the plastic lid on the inside. I would like to repair it since it is in an area that is like a seam so it would be a clean repair.

Is any of the silicone products out there safe to use on a Mashtun? If not what is and where can I get some?


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Old 05-03-2007, 06:40 PM   #2
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I think most Silicone Aquarium Sealants are food safe. I'd double check, but that might be your best bet.

If so they are available at most PetSmarts/PetCo's/etc


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Old 05-03-2007, 06:45 PM   #3
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most of the silicone sealants i know have fungicide in them (trust me you don't want those in your beer). I guess the million dollar question is will liquids come into contact with it?
If not i'd say fine IMO!! iyou could also try using silicone for fish tanks (non-toxic when cured) this has had all the nasties taken out of it so as not to kill the fish.
How big is the crack? you could probably just throw a blanket over it when mashing to hold the heat better.
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Old 05-03-2007, 07:02 PM   #4
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I used aquarium sealant on mine, which you can get at Lowes or Home Depot. It's 100% clear silicone, can stand up to higher than boiling temps, and it is food-safe when cured.
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Old 05-03-2007, 08:05 PM   #5
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As long as it's 100% silicone, you will be alright.
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Old 05-04-2007, 02:16 PM   #6
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Default Is Silicone Sealant Safe for Mashtun repair? Thanks

Thanks all! I appreciate your input. I will be heading into town to pick up some Aquarium Silicone sealant and fix my mashtun. Seems right as it doesn't kill the fish, it won't kill me LOL.
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Old 05-04-2007, 04:44 PM   #7
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Quote:
Originally Posted by Buford
I used aquarium sealant on mine, which you can get at Lowes or Home Depot. It's 100% clear silicone, can stand up to higher than boiling temps, and it is food-safe when cured.
What brand and type are you using I couldn't find any that was high temp AND food grade. I even called DAP and got the run around from some guy who didn't know anything.

Thanks
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Old 05-04-2007, 07:30 PM   #8
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100% silicone, which is what aquarium sealant is, should good for up to around 400 degrees F, so hot water isn't an issue.

EDIT: I just realized something I had forgotten from making my mash tun. Cooler walls are often made of polyethylene. Polyethylene is one of the few things that cured silicone won't stick to - it'll just peel right off. The only silicone applications I made were on brass and stainless steel hardware in the tun.
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Old 07-16-2010, 06:01 AM   #9
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I've used silicone to fix leak in a fishtank before, so i'd imagine it would be safe for a cooler.
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Old 07-16-2010, 10:33 AM   #10
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I got FDA certified food grade silicone sealant from McMaster.

Catalog page 3388 will show you what's food grade and what's not.


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