Home Brew Forums > Home Brewing Beer > DIY Projects > Kettles, Mash Tuns, & Hot Liquor Tanks > Sealant Acceptable for HLT?
Thread Tools
Old 07-30-2008, 05:10 PM   #1
Feedback Score: 0 reviews
Join Date: Apr 2008
Location: Madison, WI
Posts: 984
Liked 7 Times on 5 Posts
Likes Given: 8

Default Sealant Acceptable for HLT?

I've got a cooler which i intend on using as my HLT. It was a quick & dirty fabrication, and the valve thru the wall leaks a little. I've got the outside sealed up with this sealant, but i was hoping someone had any info on whether it could be used on the *inside* of the tank, too:

Bath & Kitchen Silicone II

Although it'll only see barely boiling water, i don't want any toxins leeched out.

~~ Malted barley wants to become beer. ~~
cactusgarrett is offline
Reply With Quote
Old 07-30-2008, 05:50 PM   #2
Feedback Score: 0 reviews
Join Date: Apr 2008
Location: Schaumburg, IL
Posts: 446
Liked 2 Times on 2 Posts
Likes Given: 2


Well from what I see it should work. But nowhere does it say its food safe. If anything bad does get in there it will go through a boil but I don't know if that will fix the problem.

I think the best thing to do would be go get some rubber o-rings and put them against the wall between the washers and the cooler. That should fix the issue.

Mad Scientist Brewing Co.

:Fermentation Cabinet:

Primary: Bee Cave Bavarian Hefe
Secondary: Nothing
Bottled: Nothing
On Deck: Gumball Head Clone (Jekster)
Choguy03 is offline
Reply With Quote
Old 07-30-2008, 05:51 PM   #3
Feedback Score: 0 reviews
Bombo80's Avatar
Join Date: Jan 2008
Location: Maple Grove, Minnesota
Posts: 392
Liked 3 Times on 3 Posts


I'm not sure about your HLT, but when I built my MLT, out of a cooler, I bought a high temp, two part epoxy, to fill in around the valve assembly that replaced the drain valve. You might want to look at something like that instead. I can't remember the heat level, but it was well over the boiling point. Something like 300*. I just got it at the local hardware store.

Good luck
On Deck - Crabapple Wine, Delirium Tremens

Primary - Surly Furious clone, Kolsch

Secondary - Hofbrauhaus Lager

Bulk Aging - Brewtopia Barleywine, Pomegranate Wine, Red Table Wine, Wild Fox Grape Wine, Blueberry Wine
Bombo80 is offline
Reply With Quote
Old 07-30-2008, 06:33 PM   #4
Feedback Score: 1 reviews
Join Date: Jan 2007
Location: Palmer MA
Posts: 388
Liked 8 Times on 7 Posts


I bought some food grade silcone from McMaster when I had to seel a old thermometer hole in my cooler mashtun. The part number is 7545A471

(102, 103, 108, & 109) Multipurpose— Use for sealing, bonding, and gasketing. Won't run on overhead and vertical surfaces. Adhere to metal, glass, wood, silicone resin, vulcanized silicone rubber, ceramics, natural and synthetic fiber, and plastics. Begin to harden in 20 minutes. Temp. range is -75° to +400° F. Meet MIL-A-46106B, Group I, Type I. FDA compliant and USDA approved. NSF-51 certified for use with food equipment materials. UL recognized.
drez77 is offline
Reply With Quote

Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
acceptable time in a carboy??? shnitzel Beginners Beer Brewing Forum 8 03-03-2009 03:09 AM
MLT sealant Grüner Brauer Equipment/Sanitation 8 11-07-2008 06:31 AM
War: Is Collateral Damage Acceptable? TwoHeadsBrewing Debate Forum 20 10-15-2008 07:08 PM
Is light brown acceptable color for Oatmeal Stout? greg75 Recipes/Ingredients 7 10-09-2006 03:40 PM
Acceptable ambient temperature after fermentation BrewStef General Techniques 4 08-22-2006 11:23 PM

Forum Jump

Newest Threads