At AquaCave, we offer some of the best selection & best prices onAquarium Silicone Sealantsfor you marine, reef, and freshwater aquarium.
Life Expectancy; Most Silicones last as to the stated lifetime from the manufacturer from my experience in keeping literally 1000s of glass aquariums, however being under water, and the acids, etc., do take their toll on the silicone. However in an aquarium has been used, then left dry, I have found that the silicone will often leak when water is then added again. This is not a problem with a stored new/unused aquarium unless stored in sunlight.
In the case of a stored aquarium with dried or cracking silicone, it is best advised to remove the old silicone and re-apply, do NOT apply new silicone over old silicone.
Resealing an aquarium requires some patience and finesse otherwise the result will be less than desired. There are different techniques for resealing an aquarium. Some people choose to mask each pane with a rectangle of masking tape 1/2" from the adjoining pane. The tape is removed after the silicone is allowed to cure a short amount of time. Some of the best resealers choose to apply the silicone freehand. Either way, here's a few tips to help with the process.
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What aquarium silicone to use
Aquarium specific silicone from Aquarium Sealants. Going over one of the more popular aquatic topics, which aquarium silicone do I use for tank repair or building an aquarium.
Many times, people will recommend GE 100% silicone. While this is a great silicone, it’s not the best for aquarium applications. Aquarium Sealants is meant for aquariums. How does this make it different than other silicones?
Fist aquarium silicone is FDA approved. If it’s safe to be around our food, it’s safe to be around our fish.
It can handle temp swings. As the aquarium warms up, the silicone doesn’t degrade.
It’s slow curing, meaning longest lasting.
Lastly, when you purchase aquarium silicone, the money used, goes back into the hobby. Not out of the hobby, because the purchase was made at a hardwood store.
Highly recommended by American Aquarium
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About Aquarium Silicone
Purchase Resource: For Plexiglass/Acrylic aquariums you would need to use Plexiglass or PVC Cement (Glue) which works by “melting” the Plexiglass panels together. This is best applied with a needle applicator between the Plexiglass panels along with applying pressure. Silicone is often used after initial Plexiglass construction to provide more water tight seal along the seams of a Plexiglass/Acrylic aquarium, but this will peel after time (it can be re-applied) and provides NO strength for the actual plexiglass panels.I'm having to reseal my 210 and have been looking online and asking around local fish stores which is the best silicone sealant to use. I've gotten so many answers, from Aqueon's aquarium silicone to GE silicone 1 to GE SCS 1200. Any suggestions? I want to do this right for the tank and the fish so I want the best one for my size tank.Hello Dee, It would depend on what the ornament is made of. If it is a safe material for the aquarium and you’d like to give it an extra coat for protection, several coats of a clear spray enamel has been the best in my experience. Silicone would work as well but in my experience, is thicker and not as clear.