I am a huge fan of Musclebound, as it greatly expedited the installation of the backsplash in my kitchen, as well as the tile in the bathtub surround of my guest bathroom. NO MESS! It sticks beautifully to sheetrock and cement backerboard and makes tile installation quick, painless, and foolproof. HOWEVER! It will not work on Schluter’s Kerdi Board (which I just learned the hard way). Carla from Musslebound’s customer support stepped in and very generously offered me a refund for those roles of Musselbound that would not stick to the Kerdi Board. Exemplary customer support, and an extraordinary product. There is nothing better for walls. — Mustang-09T 2/27/15