Almost any mildewicide will do the trick. Grout sealants all seem to work but I would go specifically to a tile shop to see what they recommend. I think most sealers will work but application and pr ... read more
a stainless steel film will be easy to keep clean and won't do much damge to the wall when removed. http://www.amazon.com/Instant-Appliance-Stick-Stainless-Steel/dp/B00BAUPS9M