3M AUTHORIZED. Official 3M reflective films and inks on durable, rustproof aluminum ensure that our signs meet all DOT requirements for outdoor parking and traffic signs. Hi Intensity Reflective Aluminum is 3x more reflective than Engineer Grade. DURABLE ALUMINUM. Heavy-duty rustproof aluminum has a 10+ year outdoor durability rating backed by a 3M warranty. LAMINATED. Graphics are protected from weather and abuse. Graffiti can be cleaned off. Laminated signs outlast competitive unlaminated or overcoated signs. INSTALLATION. All signs come with pre-punched and pre-cleared mounting holes for easy installation. Signs have rounded, burr-free corners for safe handling. Signs mount to U-channel posts, square or round galvanized posts, wooden posts and chain link fences. SAFETY AWARENESS. Use this Be Prepared To Stop, Trucks Entering And Exiting The Road Sign to caution motorists against heavy vehicles. Reflective Signs Are Hard to Ignore
Reflective signs illuminate when struck by light from headlights or any other source. This makes the message readable even in dark and low lighting.

3M High Intensity ["HI"] Reflective
3M High Intensity reflective signs offer exceptional reflectance - especially when approached at an angle. 3M High Intensity signs have 10-year outdoor warranty.

USA's Oldest Sign Manufacturer
Family owned since 1918, we take immense pride in our signage. Being one of the oldest certainly means we know this business in and out. Our South Dakota factory is the oldest manufacturer of metal signs in the USA. We have been an integral part of safety and convenience our signs have provided over the years.

Industry Leading Durability
3M High Intensity signs have a 10-year outdoor warranty, but most signs last much longer. Our 80 mil thick sign is 3 times as reflective as Engineer Grade. Unlike many other signs, our Be Prepared To Stop, Trucks Entering And Exiting The Road Sign uses industry-leading 3M inks and not off-brand or other low-durability inkjet pigments that fade in a year or two.