Before you tap the axle seal into the housing ends, put a light coat of Permatex into its bore.

Soon after the first time I ever R&R'd axle bearings, I needed to pull one of the axles to replace the left-hand studs. It was then I noticed gear-fluid had crept from around the outer perimeter of the seal.

Maybe I didn't install it correctly but I would think, Sure-Grip additive shouldn't find its way into axle bearings.