The loctite 515 does work very good. It is similar to DaveRS23's post in regards to the right stuff and taking things apart. You'll need a hammer and a hammer scraper to get things apart. I have personally seen a part 515'd to an industrial engine block, that weighed 6,800lbs. Trying to lift the part off with a 10t crane, would lift the block off the floor. The part came off in 3 pieces... It's good stuff, but careful where you put it. I find it will come apart easier if it's metal on metal. If it's on a gasket, you have to pull the gasket apart, which is stronger than one would think.