Care of educate me? Ive done a search but am still confused. Ive noticed some pickups have this done, but wondered why. Plus it generally seems that rail and blade pups always seem to be the pups to have this done to them. I havent personally used traditional cylinder polepiece pups that are epoxy sealed (usually they are just glued). Heck, I dont even see cylinder polepiece pups anywhere searching online like that. So I guess I have two questions. What is the epoxy sealing for, and why do I see it generally on rail or blade type pups.