While all our restricted area signs are rather durable, and you may choose any, our rustproof rigid aluminum signs are designed to last at least 10 years outdoors and withstand water, chemicals, and high temperatures. Our hi-intensity and diamond-grade reflective aluminum signs are even more durable than regular aluminum and will easily last outdoors for over twelve years.  You can further enhance the life of your rigid signs by opting for the 3M SmartShield POF Laminate that promises greater protection against fading and graffiti.