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Old 12-15-2003, 11:48 AM   #1
FastFish720
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Underwater Sealant?


Does anyone know if silicon or any other sealant will seal underwater? I did my overflow box and tested it and found no leaks. Then I tested for my drain after I filled and found it keeps dropping until the water level is equal with my bulheads. So now somewhere I have a leak. Any help will be appreciated. Thanks Jake!
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Old 12-15-2003, 01:08 PM   #2
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what is it made out of? if it is acrylic sillycone will not work. if it is a small leak i have had OK luck using the 2 part underwater epoxy. with acrylic. i would not use silly cone in the tank underwater. it releases to many bad things. you will need to drain the tank/sump.

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Old 12-16-2003, 12:18 AM   #3
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Epoxy would be a good bet on acrylic. As far as silicone I have used it underwater to patch a leak temporarily(Thanks Martyn) used in small amounts its not bad unless its a nano. This is a temp solution tho, I recommend it only long enough to set up a proper holding setup for the livestock, then a proper repair or replacement
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Old 12-16-2003, 12:35 AM   #4
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CA works great also and to my understanding can be used underwater.


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Old 12-16-2003, 07:28 AM   #5
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Jeff, whats CA? More ovallatte plezzzzzz
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Old 12-16-2003, 09:06 AM   #6
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cyanoacrylate

It is stuff used in the modle world as a bonding agent. Some ppl say super glue is the same thing but super glue doesnt hold like this stuff does. Prolly basically the same thing as weldon I just havent looked hehehhe



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Old 12-16-2003, 09:42 AM   #7
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CA is tough to work with in the water. moisture is what triggers CA to bond. part of the reason why it like your skin so much. the gel is the only option here if you were to try it. i only use it to bond frags to rocks. i also only do this out of the water. it is reef safe though.

CA is different than Weld-on. CA does not bond acyrlic worth a flip compared to weld-on, you name it i have tried it on acrylic.

CA is the same as super glue. from what i have read they add various different bonding agents to the CA for particular applications, but they are all based on the same stuff.

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Old 12-16-2003, 08:24 PM   #8
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OK got yah, if its a small crack or something that doesn't need dissasembling you could prolly goop it with gel type CA, or the thick, goopy "bondo" Weldon, is that #16?
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Old 12-16-2003, 10:12 PM   #9
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Quote:
Originally posted by Doug1
OK got yah, if its a small crack or something that doesn't need dissasembling you could prolly goop it with gel type CA, or the thick, goopy "bondo" Weldon, is that #16?
if it is a crack then the best bet would be something like Weld-on 3 or less. these are lighter than water. it will capillary into the crack and make it one again. you can do this from the outside. you use a syringe applicator of this. can be purchased at the same place the Weld-on is purchased from.

you are right Weld-on 16 is the thicker stuff and it does goop well. the higher the number the thicker the cement. my favorite fix is cutting another piece of acrylic just big enough to cover the leak/crack and cement it over it. gooping style.

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Old 12-16-2003, 10:17 PM   #10
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kinda like 6011 or farmer welding rod as they call it around here
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