These two materials get compared a lot, but they actually do different jobs in signage. Most premium signs use both together. Here's how to think about them.
What is ACP?
Aluminum Composite Panel — a flat structural panel made of two thin aluminum skins bonded to a polyethylene core. Comes in 3 mm or 4 mm thickness. Available in dozens of colors and finishes (matte, glossy, brushed metal, wood, mirror).
Used for: Fascia panels, building wraps, backgrounds for letter signs, modern facades.
What is acrylic?
A transparent thermoplastic, also called Plexiglass or PMMA. Comes in many thicknesses (3, 5, 8, 12 mm) and colors (clear, white, black, gold, mirror, dozens of others). Can be cut, polished, and engraved.
Used for: Letter faces (frontlit and backlit), signage faces, displays, awards, light diffusers.
When to use ACP
Building fascia or shop facade: ACP gives a flat, modern, structural background.
Background panel for letter signs: Mount your 3D acrylic letters on a charcoal ACP fascia for a clean, premium look.
Wood-look or metal-look facades without the cost of real materials.
Shop signboards on a budget: ACP fascia + cut vinyl letters costs ~50% less than ACP + 3D letters.
When to use acrylic
3D letter faces: Acrylic is the standard material for both frontlit and backlit letters.
Lit displays: Translucent acrylic diffuses LED light evenly.
Awards, shields, name plates: Cut and engraved.
Standalone signs like wayfinding, room signs, table tops.
Together = premium
The combo we install most often for shopfronts: 4 mm ACP fascia (charcoal, brushed silver, or wood) + 3D acrylic letters with halo or frontlit LED. The ACP gives the modern background; the acrylic gives the brand its 3D presence.