I'm not a big fan of rtv on a gasket. I've tried just the gasket and it leaks. I've tried high flex and the gasket and that was worse. I've never used high tack and have heard this is the best stuff to use with a gasket. And that rtv should only be used by its self. I agree they all have there place. I work at deere dealership and we used everything from thread locker to hylomar to seal different components. But I'm trying to see what everyone is having the best luck with on these timing covers to the block and the oil pan
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