Gordon Glass Co. Black Aquarium Silicone Sealant - 10.2 Fluid oz Cartridge

I used this when reconditioning my 2006 50 gal aquarium, which has now been setup for a year after application. I used the clear, it's none yellowing and it's still mostly clear. It's actually mostly opaque in the thicker areas and clear in the thinner feathered out areas. It's easy to apply, well maybe not as easy inside of an aquarium, you need to move quickly and not touch the same areas twice. You may also need some paint thinner or similar solvent based thinner to clean up any mess. It's best to just let it dry, and use a new razor blade to scrape any excess off. Just make sure everything is prepped and very clean prior to application. One tube was plenty for the tank, I used 1" blue tape helping with straight lines. It's not necessary, but it does help make things look better. Cures overnight, but I gave it a few days prior to my leak test. They also have black, but I like the clear better on this tank. I'm sure it would be a great silicone for other applications, so use it up before any remaining in an unopened tube cures inside the tube. It's good stuff and well worth the money and your labor! Cheers!

المنتج ممتاز والبائع جدا متعاون ، انصح بالتعامل معاه وخصوصا ان هذا المنتج غير متوفر في السعودية ، وانا شاريه حق حوض السمك والسيليكون هذا غير سام ولا يسبب اي اضرار للسمك والماي انصح فيه 👍🏻👍🏻

This Aquarium Sealant is so far superior to regular hardware store silicone that it's not even in the same league. I don't buy it for anything but aquariums, because it is more expensive -- but I won't ever go back to the cheaper product. You can feel the difference when you put it on -- even with clumsy old hands like mine. You can trust the seams not to leak if you have done a proper prep job. If you are ever trying to dismantle an aquarium, you will find this product holds much, much tighter. I've broken glass trying to take aquariums apart after using this product so if you are after a temporary fix this is not the one. But if you want something permanent, this is your product. I've used both the clear and the black and highly recommend them both. I've operated an aquarium store with many custom made aquariums that were assembled using this product and never had one leak, even when shelving over time went out of level, adding a great deal of stress to at least one corner of a few aquariums.

Used it to seal a crack in a heavy plastic water bin that holds the water for my fountain water pump. Waiting to see if it holds for -40 winter coming.

Used this to reseal a fish tank. Ended up working out great! Dries pretty quickly, so be prepared to move quickly.