Nope. Is not worth the money.
Out of the loop Fluid-XP will remain non-conductive/non-capacitive perhaps 30 minutes longer than distilled water.
It will hurt your temps, its formulation has been reported as prone to "un-mix", is horrendously expensive and overall useless.
If you want the best possible temps, distilled water + a drop of biocide (to keep cheeky algae at bay).
If you are worried about galvanic corrosion, Zerex @ 5%. Zerex because is the only additive I know of that has been reported as non-toxic, as opposite to HydrX, Pentosin and others.