Everbuild Everflex Aqua Mate Aquarium Silicone Sealant – Fungicide-Free – Fast Curing – Clear – 295ml

Everbuild Everflex Aqua Mate is a reliable, fish-safe silicone sealant designed for aquarium construction and repairs. It forms a permanently flexible, watertight seal that can withstand continuous water immersion once fully cured. The translucent finish keeps the tank looking clean, and it adheres well to glass, providing a professional-quality result. Pros: Fish-safe formula, waterproof, permanently flexible, low dirt pickup, easy to apply. Cons: Needs 24 hours to fully cure, emits noticeable odor during application, cannot be applied underwater. Bottom line: A top choice for aquarium enthusiasts, offering durability, safety for aquatic life, and excellent sealing performance. Perfect for building or repairing tanks with confidence.

I recently bought a second hand aquarium which had seen better days, on investigation the sealant had pretty much failed all across the back on the bottom of the tank, although the sides were still solid , so I removed the base and stripped off all of the silicone and used the Everbuild Aqua mate silicone to re-attach the bottom glass and reseal all of the edges. It worked brilliantly. It was very easy to use, had a reasonable time (about 10 mins) before it started going too hard. I left the tank for 48hrs to fully dry and filled the tank. The seals are great even where I've gone over the original sealant. Considering I've never repaired an aquarium before I wouldn't have any reservations doing the same again in future. In my opinion 10 out of 10

We bought this to seal our fish tank and it definitely works !! Our tank was very large so held a lot of water so I didn’t have much hope it would keep sealed but it did so definitely recommend this stuff

Like most silicone sealants, this one stinks. But that's its only flaw. Its easy to apply and work with. Plus its aquarium safe, making it perfect for aquariums and (in my case) sealing a wooden vivarium for their reptile. Have used on a past vivarium and had no issues then, and no issues with my new one too. Just be sure to leave it to cure and for the smell to dissipate before introducing any animals to the area.

This product is fantastic. I have built my own sumps, filters, aquariums and repaired a fair few also and never had a single issue. Very strong and durable, long lasting (some of these tanks and filters are over 10 years old now and show zero signs of fatigue) and surprisingly more than you think in the tube so great value for money. Follow the instructions and do your prep and you will have no issues and zero cleaning. (sometimes on a poor sealant job little flaps are left. I have seen this and when the tank is established they start to lift and algae grow underneath these. The seal will hold but you won't get rid of the algae. A good job is 'ALL' in the prep).

This is a great quality product. Badged for aquariums means it is strong and works well when permanently immersed in water so perfect for any such application.

Although it says that it is good for pond-liner repairs, I found that it is probably not really designed (and therefore not ideal) for that. If the bead is a bit thick it does not fully set / cure, but remains flexible and comes away easily. It is not easy to spread on the patch / liner (probably not required for aquarium building) other sealants usually tell you how to spread /finish (e.g. spatula / stick & soapy water). Thus it is easy to apply it a bit too thickly. It is unsightly (shiny clear) on black pond-liner. It says wait 24 hrs before moving the aquarium and allow to fully cure before introducing water. But that 'full curing' time is not quoted anywhere, even on the Aquamate site or product data sheets. Most other sealants are fully cured after 24hrs. I waited 24hrs+ and filled to above the patch level but it still leaked. It does have a proviso to test pond-liner before using, but if it doesn't work on Butyl (which is probably the most used material historically) then it is not really suitable for pond-liner repairs in my view. Back to the drawing board and another form of sealant.

My original fish tank had been dry for over 10 years, so before using it again I decided I should err on the side of caution and re-seal it. I choose this particular brand of sealant on the strength of other reviews. First time I've tried to reseal a tank, and I suppose I made a bit of a mess of it (the gap between the glass and the tape I put down was too much, and I cut too much off the end of the nozzle so I squirted out way more than needed. I was so worried about it drying too fast that I hurried the job so in the end it wasn't as smooth as it could have been... all of which are faults of the operator, not the sealant!). While curing it had a extremely powerful vinegar like smell, almost overpowering if I stuck my head inside the tank. I left it for 48 hours and then I tried filling the tank a bit at a time - all went well, no leaks nor did the tank collapse. (A reminder, I resealed the tank by cutting out the existing silicon inside the tank, but I did not dismantle the panes and glue them together again... I'm not that brave!). As it is the tank has been running for about 3 weeks so far without issue, so I'm happy enough with this Everbuild product and would be perfectly happy to use it again should I need to reseal any more tanks. Edit: 18May2024. Here I am revisiting this review after a year. The tank I sealed is still going strong with no leaks or related incidents since sealing back in March 2023. Edit: 24Jul2025. Tank retains its "no leaks" status for another year.

I am SO IMPRESSED by this silicone. It fixed all my issues, I bought a 130gallon tank that needed resealing. I had to take all the old silicone off, and reseal the entire thing- this was my first ever time doing it and this silicone made my first time experience a positive one. Easy to use, stinks like nail polish remover so WEAR A MASK but it really fixed up the job and looks great. Amazing value! $23 for a tube of silicone that seals an ENTIRE 130g tank (all 4 sides inside and out, and bottom inside of tank) is a steal. Highly recommend!

In meno di un giorno si è asciugato. E tiene perfettamente. Non ho più avuto perdite.

Super produit, qui colle top! Avec un bon nettoyage des vitres avant bien évidemment, étanche Niquel. Date de fabrication du produit bien présente sur la cartouche comparer à d’autres marquer comme Hud*** à 5€ plus chère et reçu avec la date effacée donc bon.. je recommande vraiment ce produit 👍

Por mi experiencia, puedo afirmar que la capacidad para fijar cristales es increíble, llevo 2 acuarios montados con esta y no he tenido ninguna fuga ni problemas con piezas que se despeguen (las perimetrales se pegaron si problemas).

Smidigt att applicera.