Best Penetrant to Remove Differential U-Bolts?

U bolts are cheap. The fight isnt worth $30 imho.
I bought new ones for the barracuda,i have removed my diff 6 times now, roll it in shop, set up rotisserie and pull diff and springs.
Sunday i re-assemble and roll it back into storage.
Agreed. About half seem to gall and twist off anyway.