it's not for compression joints, is it?
I find 4 turns of PTFE tape round the olive, after you've seated it, makes an excellent seal.
It's also very clean on the fingers.
Look out for old-school plumbers who were trained before it ws invented, though.
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local