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Silicone Sealant
#1
Hello,

I wonder if you can help me.

I have been running a marine tank for a number of years with no issues.

I have a hooded aquarium (basically a converted tropical tank (marina style 95) to marine) to stop the cats and kids messing. I ripped out the T8 tube, ballasts etc and mounted my led light strip into it with no issue.

I placed in a few brackets around the edges of my tank to hold my condenstation tray in place, but the brackets / tray and lid kinda interfere with each other.

My idea is to use some spare transparent acrylic sheet I have lying about and silicone a peice of it into my lid, purely to stop any surface agitation and condenstation from resting on my led strip, so it will kinda just be a strip, rather that being full sealing my light off (which I don't want to do, because of led heat).

I have a fresh bottle of this silicone lying about https://www.arbo.co.uk/products/silicone...rbosil-lm/
This is the datasheet: https://www.arbo.co.uk/wp-content/upload...-LM-LR.pdf

It has no fungicide, and is just low modulus silicone sealant (afaik, only need the high modulus when it comes to holding glass etc together).

Would this sealant be safe to use as I'm only going to holding a little bit of acrylic sheet in the lid?

Thanks in advance.
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#2
I think that silicone sealant is fine once its cured. If you were resealing the tank most people recommend using HA6 if I remember correctly, again because of strength and it doesn't leach anything into the water.

Welcome to btw Smile
 😇 Heaven doesn’t want me...
And Hell is afraid I’ll take over! 😈
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#3
(06-06-2019, 03:22 PM)Gingerlove05 Wrote: I think that silicone sealant is fine once its cured. If you were resealing the tank most people recommend using HA6 if I remember correctly, again because of strength and it doesn't leach anything into the water.

Cheers mate! Appreciate the help.
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#4
The only sealant that I know can be used on an aquarium is BondIt HA6 silicone sealant although I am sure there are other brands that are also suitable.
Available at many places at reasonable prices. ebay link
6 foot (600L) South America Rio Guaporé river theme.

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#5
I don't think I'm going to go with silicone after realising that I have a hot glue gun that's been sitting in a box waiting for me to do something with it.

I'm not actually going to be getting it 'wet' or trying to seal anything with it, so should be ok to hold a piece of thin acrylic in the lid.

Thanks for the advise though, I'll keep it in mind if I ever have to touch any aquarium safe silicone.
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#6
Silicone doesn't bond to acrylic properly so i wouldn't use it. You'd be better off with superglue or epoxy.
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#7
i have just resealed 6 aquariums using HA6 (black) silicon. i will not be using anything else from now on. low smell, easy to smooth over, i got mine from ebay. for me nothing beats it
theres no such a thing as a stupid question!
its just an answer you dont know
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#8
(10-06-2019, 09:20 AM)fr499y Wrote: Silicone doesn't bond to acrylic properly so i wouldn't use it. You'd be better off with superglue or epoxy.

Glad I stayed away from it. Managed to complete my modifications on Saturday.

Ripped the old driver and t8 ballasts out the hood, and added a deeper cut out to the 'hob filter' cut out in the shape of my skimmer (which is now on the back wall of the tank and making use of the glass clip).

The hot glue gun seems to have done the job, I've done two vertical strips in the hood along with a horizontal strip across them, all glued to one another and into position. Although it doesn't look the prettiest, it does the job well and you can only see it if you open the flap on the lid.

4 days later, seems to be holding and no water is getting onto my light (although its IP67, I still don't fancy any water getting on it)

Thanks for the advice as always.

Few pics below.

[Image: 7Ac6P1P.jpg]

[Image: 6foahi8.jpg]
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