Really strange this, it's a 400l upright from Gardiners, with the vented top, and a plastic 90degree angled barb, plastic.
I've must have put 10 windings of tape on there (the right way around), and screwed it in as far as it go, not all the way in, because I need such excessive force to do so, and it says don't over tighten, which I better not do then.
Anyway, there is still small drip coming from the bottom of it, and I need something to seal it with.
What can I use?
Thanks.