"The other reviews give you a good idea about this stuff but I have a couple of points. I only use it on domestic water systems, so the following just applies to those.
Curing time (the subject of some other reviews) I find to be pretty much instant. Do up the joint and it's ready to use. In practice, you usually end up leaving it for a while anyhow, but it should work straight away.
You must make sure both male and female threads are clean (no grease or paint, etc) and use it on both of them, not just the male one.
There shouldn't be any need to use gallons of it. Just a decent squirt on each thread, spread around with a finger, will do. It sticks well to fingers, so consider using disposable gloves.
Wipe off any excess with either an old cloth or some tissue as soon as you've tightened the joint. If there's lots, you've used too much.
All this discussion about leaving it upside down. Just squeeze the tube from the bottom, it's not hard!
Before I used this variety, I used Talon Liquid PTFE which is brilliant, but I've found this to be just as good and much cheaper.
"So far, I've used this for installing new radiator tails and an outside tap where it was impossible to torque up the fitting without damaging it. All threads were sealed perfectly.
It's very thick and can be difficult to get out at first (kinda like the old glass ketchup bottles) but persevere and then keep it stored on its side or upside down for future use. I also found out that if you forget to put the lid back on, it doesn't dry up into a large blue crust overnight. Which is nice."
"It does what it says on the bottle "No Nonsense". Geat for the tool bag as a one stop shop as it covers Gas ,Water and Air. saves the time did you put too much or too little tape on . ideal for working in tight corners."
"Making up a garden tap with a wall angle bracket and as one of the previous posters commented, it is near impossible to obtain the correct position of the tap while fully tightening the screw. I tried several layers of ptfe tape, no good. I made up the joint with this product and success, the position is locked in place while giving the apparent seal. Some of you commented, that the sealant was too thick. What I did was to take the top off the bottle then gently squeezing the container, allow some of the gloop to fall into the nozzle, then put it back together using as directed. You cannot have it both ways, it needs to be thick to stay on the threads. I might try gently warming the bottle in water to reduce the viscosity if necessary.."
"I got this for use on solar systems because of its high temperature range, but have used it on every threaded joint because it doesn't shred like tape. I gave it an extreme test when fitting a garden tap. After fitting a wall plate elbow and screwing on the tap it will end up pointing anywhere but straight down. Smooth this paste onto the tap threads and screw it almost fully home until the tap is at the right angle, then wait for the surplus paste to turn clear. Assembled by hand but would need spanners to undo! I agree with the other reviews about the thickness and difficulty getting it out of the container, but stored nozzle down and tap the lid on the floor before starting and it comes out OK. Not suitable for olives / compression joints, just threaded ones."
"This is a great product that has never let me down, the only fault I can find is that the liquid is a little thick and you do have problems getting it to come out, I have found it's best to store it upside down in you tool box for a quicker application."
"These posts are censored as I gave some feedback before,, but did not appear. Basically its ideal for small pipe threads, but not so clever on larger stuff (been using this and others for years, so loads of experience). The secret to getting it out of the bottle is to store upside down, when very empty, tape about a metre of string to it, then swing it around your head to use centrifugal force to get the goo in to the cap :)"
"..used this on the joints of a shower (behind a fake panel), where ptfe tape had failed (twice) previously. Read other comments about putting pot upside down for a while before use (this helped). Silly container, good 'stuff''."
"This product works very well however either my bottle was faulty or it is not quite right. I had to take off the lid and use a small paint brush to get the product out. I would assume this is not quite right as it comes in a squeezeable bottle. so as I said it may have been a faulty bottle. But the product works very well."