Made of 100% real glass; The subtle crackled glass look of the Ice glass block pattern transmits moderate light with a high degree of privacy; For use with ProVantage silicone or mortar assembly methods; 4-in thick glass block is great for interior and exterior projects such as shower and bath enclosures, walls, room dividers, landings, railings, kitchens, entry ways and much more; White edge coating results in a brighter completed glass block project; Helps reduce outside noise making your living and work...