I have a Mazda 5. There's a blind engine cover plug on the head that still has a slow oil leak. I used permatex high temp thread sealant when I tried sealing it the last time. Can I use blue 243 loctite as a thread sealant? The packaging says it'll prevent leaks. I wonder if the vibration cause it to come undone and cause it to leak. The threads is standard and is not a pipe thread. It has a copper crush washer which I've replaced too. 10ftlb is what is specified in the FSM. Couldn't find a conclusive answer googling around. Thank you.