Painted Aluminum with Corrugated Polypropylene Core—Also known as Alumalite, aluminum signs with a corrugated polypropylene core are lightweight and the most durable signs we offer. Designed for use as permanent signs, they stand up to severe weather without bending or warping. You see them in parking lots and along the side of the road on sign posts identifying buildings and directing visitor traffic. Print on them with a silkscreen or digital printer. They have a polished appearance that lasts for years without cracking or peeling. Customize your sign's shape with a saw, router, or CNC machine. All are UL recognized for use in electrical systems, such as illuminated signs.

Corrugated Polypropylene—Corrugated polypropylene signs are durable enough for temporary use outdoors. They're commonly paired with sign stakes. Polystyrene foam is also called foam core.