Coroplast, ACM (aluminum composite), and rigid PVC are all used for signs and displays. They differ in durability, weight, and cost.
Coroplast
Coroplast is corrugated plastic—light, low-cost, and good for short-term outdoor use like yard signs and event signage. It can warp in heat and is not suitable for long-term permanent installs.
ACM
ACM is a foam core between two aluminum faces. It is rigid, flat, and holds up well outdoors. Used for real estate signs, wayfinding, and long-life exterior signage. Heavier and more expensive than Coroplast.
Rigid PVC
Rigid PVC (vinyl) is a solid plastic sheet. It is durable, weather-resistant, and can be used indoors or out. Often used for indoor signs, nameplates, and applications where a smooth, stiff panel is needed.
Quick comparison
• Coroplast: light, cheap, short- to medium-term outdoor.
• ACM: rigid, flat, long-term outdoor, higher cost.
• Rigid PVC: durable, smooth, indoor or outdoor, mid-range cost.
Common mistake
Choosing Coroplast for a sign that will stay up for years in full sun. It will eventually warp and fade. Use ACM or a material rated for long-term outdoor use.