Stone Honeycomb Panels can last for a long time on outdoor wall coverings, up to 20-30 years or more, depending on several factors such as weather conditions, maintenance, and quality of installation. The panels are designed to withstand harsh weather conditions such as rain, wind, and snow, making them a durable and reliable option for outdoor wall coverings. However, regular maintenance and cleaning can help prolong the life of the panels and ensure their appearance remains intact.