I used the sealant on my log splitter project with many different fittings and sizes. I followed the instructions for the cure time. I didn’t have any leak on the first start up or any so far. I’ve used it on over 45 fittings. It’s priced like gold but it does was designed to do.
https://www.amazon.com/Loctite-Pneumatic-Hydraulic-Sealant-36-Milliliter/dp/B003XZB54O