Ok, this is the stuff we used, according to the label unaffected by gas, oil and water ... time will tell.
I put it in the O ring recess and on the flat surface or the sensor as well as the surface of the tank as well which is slightly convex
Autozone in Mexico has Permatex so if this fails we will try that, on reading both labels etc this stuff appears to be more gasoline resistant ..... and it smells great
