I am about to put together a new piston and cylinder on a 575XP. Going to do the gasket delete. I checked the squish and it was .028 without the gasket. What kind of sealer should I use between the cylinder and Case? Looking on this site a lot of people like the Loctite 518, but I do not see on it anywhere that It is high temp, or compatible with gasoline. The Permatex Motoseal says it is good for 400°F and is fuel resistant. Which one should I use?