40 mil polystyrene plastic, the UV and scratch resistant signs will last you a lifetime.
â¢VISIBLE IN ANY ENVIRONMENT: Designed with fade-proof ink, bold smart fonts, and vivid colors, these scratch-resistant pre-finished white safety signs are engineered for clear visibility in poor lighting and severe weather conditions. Made from premium 3M material, these signs are specifically designed to be applied to almost any clean, flat surface. Aluminum signs are durable, strong, and able to stand up to tough weather conditions.