[xweaponx]

Personal Opinions:

Various cleaning products may fade or leach the dye. I have mine black dyed and sweaty hands, oil, surface contact, etc has yet to fade or leach the color... but then I always pamper my device too.

However...

Alcohol, peroxide, acetone, industrial cleaners and citrus agents may leach the color. But this would be expected to happen since this is an unprotected modification and many cleaning agents are aggressive in their design to breakup & dissolve pigments, dyes, inks, etc. Darker colors will last longer and increased submerged soak time of your cover will ensure deeper dye penetration.

I personally heated my dye before submerging close to boiling then reduces heat to medium. My cover soaked in a complete box of dye. Some colors like red, orange, green, etc may need two boxes of concentrated dye. Since this mod is relatively inexpensive, an additional box may not hurt.

Just an idea...

As a sealer you could try Future Floor polish. Its a VERY tough acrylic (water based) clear finish that has fast drying, non-yellowing and long lasting luster. Simply dillute with dissted water for a milky consistency and spary/airbrush on if you have proper tools. <---- (sealer I used in my 1/48 scale airplane modelling days)

Remember that over time the surface of the battery cover will naturally degrade purely from daily used and once the rubbereized coating is gone, simply using 1000 grit sandpaper to gently rough the surface will give new dye something to grip...