This product is purely handmade. The texture of each piece of cement wall decoration is unique. It will change with time and environment, and various colors, cracks and conditions that may appear are normal. Cement wall coverings are a material that will allow you to realize your creativity. Each of them is unique, and it will change with the time and the environment. Each of the is changing craft and it's not waterproof. The colors changing, cracking and any other phenomenon may emerge naturally from the characteristics of concrete. "Casting Tile" styling and parting design are well calculated for assembling variations. The casting tiles are only the elements for your creation. By the way, good choice ! Name of Product: Cement Wall Decoration - Wave Manufacturing: Sanhui Materials Co., Ltd. Phone: + 886 ̇4 ̇2699 ̇0968 Address: No. 81-33, Lane 245, Section 3, Shatian Road, Dadu District, Taichung City Place of Origin: Taiwan Ingredients: cement, quartz sand Weight: NW 17 kg / GW 17.6 kg (± 0.5) Area: 0.4 m2 / box Usage: Use beneficial clay or epoxy resin (AB glue), please clean the adhesive before construction.