When you wash your hands for bread you must remove all things from your hand that will prevent the water from washing underneath like a ring or band-aid. What about by Negel Vasser, does the same problem apply?
Rav Shlomo Zalman Braun in She'arim Metzuyanim B'Halacha (2 k.a. 6) brings from the Sefer HaEshkol and the Yad Shaul that when a man goes to the Mikva for Tevilas Ezra (when he is a Ba'al Keri), a chatzitza does not invalidate the Tevila. Therefore says Rav Braun, it is possible that the chatzitza does not pasul Negel Vasser. He adds that it seems also from the words of the Eishel Avrohom that Negel Vasser is not as stringent as Netilas Yadayim for a seudah and the rules of chatzitza do not apply.
Important Note: We try to convey the Tshuva to the best of our ability. We admit that our understanding may not be accurate. One should learn the tshuva to verify the accuracy of our interpretation. Please also understand that this Tshuva may not be the final word on this topic. One should consult a Rav before drawing any conclusions.