This material test compares polycarbonate, modified acrylic, and cast acrylic for illuminated sign faces.

What the test showed

• Polycarbonate: extremely tough and bendable, though it can yellow over time without UV protection.
• Modified acrylic: strong, break resistant, and less prone to yellowing, making it a preferred material for many electric signs.
• Cast acrylic: more brittle and not a preferred choice for SignMonkey sign faces.

For most illuminated sign faces, toughness and outdoor durability matter more than just looking clear on day one.