Black silicone for aquariums

JOKER · Jun 3, 2013

what type of black silicone is the best for a tank? There are many clear ones but not finding many black

pickupman66 · Jun 3, 2013

it shoudl be 100% RTV silicone. it is an adhesive sealant. if you are looking for some, call Glass cages. they sell it. we use it on our Stoves here so I was able to get some here too.

c_healy · Jun 3, 2013

We sell it at my work..let me know how much you want and I can get you a price and ship it.

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mixer911 · Jun 3, 2013

This is what aquarium builders use McMaster-Carr Item #7545A462

RTV-103 is black

JOKER · Jun 4, 2013

Thanks guys. Im just resealing a tank to make sure before I fill it up.

pickupman66 · Jun 4, 2013

make sure you have all of the old off before you put new on top. uncured silicone wont bond with cured silicone.

JOKER · Jun 5, 2013

That's what I was thinking, I plan to just use acetone to clean up the leftover before resealing. Am I right that I can cut the old out as long as I do not disturb the seam between the glass and be fine?

pickupman66 · Jun 5, 2013

yes. you Should be good doing that. I re-did a 225 a fwe years back when I replaced an entire panel and the top braces. I scraped all the silicone off the inside that I could get to and then went back over it with acetone. that glass needs to be perfectly clear. this goes for ALL SEAMS on the inside. if you are just fixing one corner, you need to do it all. NOw, that its clean, get some painters tape and run it around all the edges so you get a perfect edge out of the silicone. with black, it will really show your edges.

JOKER · Jun 5, 2013

Why does ge and dow say they do not recommend their silicone for fish tank?? Is it just a gimic so others can label stuff for fish tank? I called and talked to both. I looked at some of the aquarium stuff and it says not recommended for tanks over 30 gallons. I am either using the dow or the rtv one.