What joint sealer is best for plumbing? 

Is anyone else's favourite bit when he does the friendly, "Hi everyone" with a bit of a headshake then does that tut then "welcome along to today's video" before starting. 😊

Hi Al brilliant again I did purchase the fernox jointing compound over the years and it’s brilliant thank you again for your advice see you soon David

Yep, I agree I use the Fernox too, never had a single problem with it or the joint. 🍻👍👍

Hi Al loctite 55 thread sealing cord is the new version of hemp, it's great stuff.

Great advise as always dereton, I'm with you on this one, I always use Boss White (still available in B&Q) on compression joints, it never fails & is far less fiddly than PTFE tape 🙂

I've been lucky enough to never have any leakage. However after watching this video, I think I'll start and put a blob of paste on the olive. Thanks for the good advice 👍

Sound advice!! I personally always wrap PTFE around my olives 4-5 times. I’ve heard some people like to dip their olives in boss white but I’m not flexible enough to try that 😜

You saved me with PTFE tape once. I had a stopcock, massive pressure under the sink, it was pumping so hard the pipes were moving as though possessed by an evil spirit. Leaking constantly, I looked up your advise and then it was all perfect daisies

Another great vid from the boss. Nothing like a bit of hemp in your joint!

I've tried a joint compound recently to see if it was better than PTFE tape. Very messy to apply, hard to clean off fingers, and doesn't want to stay where it's applied. Maybe this is specific to this product, but given this one experience, I think I'll use PTFE going ahead in future as a first resort. Just easier to handle.

Thank you. In my DIY plumbing I’ve been using potable jointing compound (flomasta) on olives (not threads) and only used PTFE on radiator tails with tapered threads. Still learning though.

Never knew of these. When I was updating my bathroom I removed an old toilet waste pipe and it was sealed in place with lead.

I agree entirely, as belt and braces put a bit paste on compression fittings, I'm not a plumber admittedly but I feel a complete noob whenever I do it, but I'd rather tighten up once and know it is sealed without having to worry.

Fernox LS-X is my fav never had a problem

Laco slic tite I'd recommend comes with a brush compound with ptfe inside aswell, LSX very good for male threads

Hi Al and Jan ☺, always good to see you mate, and it's the never ending dilemma Wether to use a joint sealer or not,lol. As for myself I'd rather give it full belt and braces, obviously whith potable approved paste, and or ptfe, or if I'm in doubt both, ha ha, I'd never forgive me self if I had to re,do the joint, especially if that involved draining down the pipework again to reseal it. When faced with a compression fitting for the first time the novice diyer doesn't realy know how tight to make the joint, or understands just what's happening inside the fitting when they apply spanners to it. I can't remember if you've already made a video showing the proper procedure, but I'm sure your advice would be greatly appreciated anyway. Cheers Al, stay safe mate, best wishe's to you and Jan, Stuart UK.

Thx 4 lesson - always gd 2 lern from some1 who have bit of expirence 👍

I've always used Fernox LS-X jointing compound on compression joints, it looks like a silicone gel, i'm only a DIY person, but never had a leak. Fitted probably 10 bathrooms in my life.

There were videos somewhere about using jointing compound on the inside collar of a water supply pipe and it may be useful to provide links to the videos with the merits of different types of washers nylon, rubber, fibre and where to place the compound paste and potential problems.

I used loctite 55 on some threaded radiator tails. I needed to remove one but couldn’t because the loctite 55 makes such a tight fit. I will use PTFE if I ever do these again.

Threaded fittings - liquid ptfe or just ptfe. You don't need anything else Compression joints - couple wraps of ptfe around the olive or some paste (I prefer Swan seal by black swan) and you'll be fine.

I’ve only ever put PTFE around the screw thread. Surprised to hear this.

You can still use it as a Halloween wig right 😉🤣. Actually I avoid using Polytetrafluoroethylene tape it`s a rookie move and it gives a poor appearance. and I will only use it if the thread machining is a sloppy fit. Always check fitment first and then type of metal. I would always recommend greasing the thread as that alone will usually result in a leak free joint. Anyhow that`s my humble opine. Keep up the great work Mr. Al as I always look forward to your video`s. 👍👍👍

Hi Al, I'm confused as to which fernox sealing compound I should use. There seems to be a yellow tin and a blue tin. Which one is for drinking water pipework and which one is for central heating pipework and is there one that does both. Many thanks 😊

Hi Al have you tried Loctite 55 pipe sealing cord excellent for threaded fittings

Hi Al, please would you tell me if this is right? I'm about to put LS-X Fernox Jointing Compund on the olive of an elbow isolation valve on the potable water in the kitchen? (I have PTFE tape too just incase) Thank you.

I had a leaking radiator years ago and a neighbour wound some string round which stopped the leak. Unfortunately the rad is permanently on!

Hi Al , enjoyed this video , could you give me some advice please , I have a tub of Wolsey jet blue plus multi purpose sealant , can I smear that on a compression fitting olive etc ? It says it is potable and WRAS approved, regards Dermot.

ANd there's me thinking that you were holding up your new wig when it was hemp!

Boffins eh? don't you just love them (NOT) Love your channel Al, I only do a little DIY plumbing, I was a sparky once until the boffins got involved with that Ha Ha! Retired now and would probably fail any exams the boffins have come up with these days.

I ❤️ hemp 👍🏿 no paste just a rizla 😋😋😜😜 scewfix sell hemp that's where i got mine

why no ptfe on the first thread shown, "thats a no-no!", but you then say its alright around the next thread?

I definitely wouldn't use nothing on compression joints no matter what the manufacturers/experts say. I always tighten the joint, loosen it again, wrap ptfe around the olive and tighten it back up.. Takes longer, but it works for me.

EU here. Hemp and green paste all the way.

Hi Al, Enjoy you videos and appreciate the many years of experience in the plumbing trade. Wanted to ask why they make a non potable version of paste when surely you can use the potable version for all jobs. Cheers, keep the videos coming.

Flomasta PTFE Liquid from screwfix, used it thousands of times, zero callbacks and it's ten times faster than regular PTFE.

Wrigley‘s Fruity Juice!

Over the last 10 years or so, more & more brass & copper fittings are made from recycled metal in China & they're not good quality, which is why I think it's more important than ever, these days, to use some kind of additional seal IF you're going to guarantee your work for 5 years or more.

Loctite 55 all day long.

Potable not portable

what are your thoughts on liquid PTFE? it is something i have seen for sale but never used or looked at.