American Olean Unglazed Mosaic Trim 5 x 12 Porcelain Built Up Base provides a robust and stylish base solution for tile projects. Made from premium porcelain, this unglazed trim offers durability, slip resistance, and water protection. Its 5 x 12 size allows for a bold statement while ensuring easy installation. Ideal for both residential and commercial settings, American Olean's built-up base trim delivers performance and elegance.