COREtec one floors are 100% waterproof. They can be installed in wet areas and will never swell when exposed to water. The patent pending construction is extremely stable. There is no need for expansion strips in large rooms and no acclimation needed prior to installation. It is easy to install over existing hard sruface floors and hides subfloor imperfections. The 12 mm wear layer provides superior durability. Two coats of the UV acrylic finnish provides superior stain resistance and cleanability.