ACM Panel Buyers Guide: Skins, Cores and Finishes

Aluminium composite material — ACM — is two aluminium skins bonded to a solid core. It is light, flat and rigid, which is why it dominates sign faces, cladding and exhibition builds.

Why the skin thickness matters The core provides stiffness; the skins provide the surface and the strength. Thicker skins resist denting and oil-canning better and hold routed folds more crisply. Thinner skins keep weight and cost down and are fine for interior signage and flat-mounted panels.

Flatness ACM stays flatter over large spans than sheet aluminium of comparable weight. For long sign faces and cladding panels this is usually the deciding factor.

Fabrication ACM routs, shears and folds easily. V-groove routing lets you fold clean box shapes without welding, which is how most sign trays and fascia panels are made.

Finishes Painted finishes suit interior and short-term exterior graphics. Higher-durability finishes hold colour longer outdoors. Brushed and metallic finishes are common for architectural work where the panel itself is the aesthetic.

Where ACM beats solid aluminium Whenever you need a large, flat, light panel that will be printed, wrapped or painted, ACM is lighter, flatter and less expensive to fabricate than solid plate.

Tell us the span, the mounting method and whether the panel is interior or exterior, and we will recommend a thickness, skin and finish.