Acrylic block windows provide the benefits of high privacy and air ventilation. Decorative glass windows offer a unique look, while egress windows are the perfect touch for your families’ safety while in the basement. Obeco Glass Blocks Pty Ltd is Australia's largest stockist and expert installer of glass blocks and glass bricks. Cast acrylic is one of the hardest thermoplastic sheet materials available and its attractive aesthetics remain for longer than other plastic sheet materials. Light weight Glass "look" cast acrylic weighs half as much as an equivalent glass panel making fabrication, installation and transportation a far more attractive proposition.