Underwater sealant

[idris]

Does anyone know of a sealant you can use underwater (ie when the surfaces to be joined are NOT dry) other than Gold Lable? As far as I can see, it's only available in large tubes for about £20, and I'd only need a few ml.

 

[Toby C]

There’s a 75ml gold label tube that’s a bit cheaper
(Called one shot - comes in black and clear

Underwater Sealer

Gold Label Underwater Sealer does exactly what the name suggests and is ideal for use in ponds and aquariums. Gold Label Underwater Sealer is remarkable and it will seal anything and everything, such as stainless steel to stainless steel, it will stick steel to plastic, plastic to wood, wood to...

www.pond-planet.co.uk

 

[foxfish]

You can use super glue just make sure its the gel type.
It will set extremely fast once it hits water so you have to work fast.

 

[zozo]

This one is also Tec7 Trans. It's an MS Polymer-based product.

Mount & Seal

Simply works.

tec7.com

AFAIK it only comes in +300ml content.

There are quite many other brands also based on MS Polymer that are the same.

It's not really that common in the aquarium trade but the best chances to find smaller contents might be in the pond shops... This stuff is often used for pond repairs and there a quite a few different brands offering it... Pond shops might offer small kits for minor liner damage repairs. Such as.

POND AND AQUARIUM FIXER LINER REPAIR SEAL SEALER SEALANT UNDERWATER ADHESIVE | eBay

Because of its good chemical resistance it is unaffected by normal pond water conditions making it the perfect sealant for any underwater jobs. The Pond and Aquarium Fixer is safe to use around all marine and fish life and contains no harmful chemicals.

www.ebay.co.uk