Is there any glue in the known universe that actually bonds to

rtv silicone?

contact adhesive

Also the glue must not leech any harmful chemicals into the water.

>>1162065

What this poster said, clear RTV silicone and superglue are the best aquarium adhesives, both are totally fish safe, let the silicone cure at least 24 hours or longer.

>>1162060
what is hot glue ?

>>1162060
Use super glue then put a layer of silicone over it.

>>1162060
Try E6000, it sticks to pretty much any synthetic material imaginable and a quick google shows people using it on PE. You should be able to find it at a fabric/sewing store if nowhere else has it.

>>1162714
Super glue is too brittle and will crack apart when the plastic flexes.

>>1162242

Jerking off won't help op

errr... solvent welding?

>>1162060
Just use some sort of mechanical connection instead.

>>1165422
This.

A "barb" fitting, that is the one that looks like a section of tapered pipes with lots of little flares, screwed into whatever it receiving your tube, sealed into place with a tiny smear of silicone if needed, should be good for most tubing.

For others, especially a somewhat stiff material like polyethelene, you want a proper fitting, usually some form of push-in fitting. It looks like a... fitting. that you push the tube into.

More complex or premade systems might have a connection crimped into place on the end of a tube but that would be special gear.

>>1162060
>soda bottle

Are you sure that's polyethylene? I think soda bottles might be more likely PETE:
https://en.wikipedia.org/wiki/Polyethylene_terephthalate

https://en.wikipedia.org/wiki/Recycling_codes#List_of_resin_identification_codes_.28RIC.29_and_codes_defined_by_the_European_Commission

>>1162060
I'd use hot glue, cause hot glue is polyethlene itself. Or you may heat up vinil tube until it starts melting and "wield" it in place, and then secure it with hot glue or silicone.