These signs are not referred in AS1319; however are available due to popular demand. They communicate information of a general nature and often refer to Housekeeping; Company Practices and Logistics. Available in various materials and sizes. About Safety Sign Material Guide 1. Metal (Colorbond Steel) A strong, 0.6mm thick rigid material manufactured from Bluescope Colorbond® Steel, guaranteed to withstand high-temperature range. Holds well in windy conditions, ideal for outdoors. Average Outdoor Durability: 5-8 Years. Chemical Resistance: Very Good Abrasion Resistance: Very Good. Upper-Temperature Limit: 80°C. Common use: Entrance, exit, traffic, parking, building, construction, directional, safety, wall, or post mounting.