Safe Glues

I received a large ornament made from Polyrin plastic, but unfortunately it arrived broken. Are there any glues safe to use in an aquarium that will stick/weld polyrin (the plastic).

Epoxy is pretty inert and would probably stick the plastic (which is hard and brittle), but I'd like to make sure it is safe (i.e. no nasty solvents/chemicals to leach out into the water).

The plastic seems too brittle to weld with a solvent, I wouldn't know one that would work with Polyrin and solvent glue would probably harm my fish anyway.

Does anyone have any words of wisdom?

Thanks

 

Good morning Popeye and Welcome to Fish Lore. The above link should help you.
Hope you enjoy the site!
Ken

 

Welcome to FishLore!

 

Welcome to Fishlore!

 

Thanks for the welcomes and thanks for the link to Superglue. I did a lot of searching since posting this and have come acrosss a few that say gel superglue is the way to go. Even though it makes your eyes water I guess once it's cured it's good to go. As the ornament hasn't been near water, I can do the fix, let it cure for a good while and then put it in the tank. Thanks again for the quick response.

 

Hmmmm...the gel superglue I looked at today stated on the pack, not suitable for continuously wet applications.....so no good for aquariums then (that particular brand)!!.

I found another (not a cyanoacrilate) which states its 100% waterproof (even in salt and chlorinated water) but doesn't indicate it's safe for aquariums (fish) so I asked the maunfacturers technical department and am waiting for a reply.

I'll advise their answer when I get it.

 

What about just plain ol' aquarium silicone? Seems to do the trick for me . Not 100% if it will stick to plastic but worth a shot and won't harm the fish.

 

HI Crazed, I'm after an adhesive (with rigidity rather than flexibility) instead of a sealant...I got a reply from the manufacturers regarding the other stuff.........It has a fungicide in so no good for fish

Back to the drawing board.

 

Hot glue is safe. Would that work for your application?

 

hot glue's safe, but in the past when i've used it, it would come off after a bit of continuous water exposure

I have, however, used 100% silicone as a glue, and it works pretty well if you let it set

 

HI Folks,

I tried aquarium silicon, but there wasn't enough area for it to stick well, so I took it all off again and ended up using superglue gel after all.

It's still holding out after nearly four weeks under water and the fish are happy so I'm happy.

Looks great too

 

Hello Popeye,
Glad to hear everything is ok!
Ken