Hi Angie,
Thank you for your question. Yes, it should be fine as long as it's not submerged. Also, it would be advisable to wipe it dry after using the shower. However, this product is actually is designed for tile and shower areas. Please copy and paste this link to view, http://kofflersales.com/p/schluter-eck-k-outside-profile.asp?cid=3658
Thank you,
The Koffler Team