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Old 08-22-2011, 01:46 AM   #1
Feb 2011
Fayetteville, Arkansas
Posts: 79

I've heard several people recommend aquarium caulk to seal leaks in MLT's (and I've heard others say caulk is not the solution).

Although my MLT appears to be leak-free, I would like to use aquarium caulk to seal my thermometer. I found another tutorial that proposes using silicone tubing with o-rings. While that tutorial looks pretty good, I already have some aquarium caulk, and I figure I could save myself a trip to the store.

Have any home brewers had issues using aquarium caulk to seal their thermometers instead of the silicone tubing and o-ring method?

The image below shows where I'd put it. The silicone cord can already pull out due to a crappy crimp in the probe. I'd just pull out the cord a couple of inches, apply a decent amount around the opening and cord, then reinsert it and make sure the gap is clogged, then wipe off any excess. Thoughts?

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Old 08-22-2011, 01:51 AM   #2
Aug 2008
Portland OR
Posts: 5,387
Liked 63 Times on 59 Posts

I'd use the caulk for short term and then cover it with some silicone tubing for the long haul.

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Old 08-22-2011, 03:27 AM   #3
BeerCanuck's Avatar
Sep 2007
St Catharines
Posts: 474
Liked 2 Times on 2 Posts

I have tried the silicone hose (pita to install) and silicone caulking (didn't hold up well)
Currently I am testing shrink wrap at the location you point out in the picture ( easy to install and seems to be holding up well so far )


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