FR-grade ACP sheets are fire-resistant, while PE-core ACP sheets are not fully fireproof.
ACP (Aluminium Composite Panel) sheets are not universally fire-resistant. Their fire safety is determined by the type of core sandwiched between the two aluminum skins.
Polyethylene (PE) Core – NOT FIRE-RESISTANT
- Highly flammable. The core acts like solid petrol.
- It will melt, drip, and fuel a fire, contributing to rapid vertical flame spread on building facades.
- Common Use: Low-cost signage, interior applications where building codes allow.
- Fire Safety: Unacceptable for most exterior cladding, especially on multi-story buildings.
Fire-Retardant (FR) Core – YES, FIRE-RESISTANT
- Contains mineral fillers (e.g., aluminium trihydrate) that make the core self-extinguishing.
- When exposed to flame, it chars and forms a barrier, significantly resisting fire spread.
- Must pass specific fire tests (e.g., BS 476 Class 0, ASTM E84 Class A).
- Common Use: The minimum recommended standard for most exterior building cladding on mid-rise structures.
- Important: While fire-retardant, it is not fully fireproof and can fail under sustained, intense fire.
Non-Combustible (A2) Core – HIGHLY FIRE-RESISTANT
- The safest option. Core is >90% mineral (e.g., mineral wool, aluminium hydroxide).
- Will not contribute to fire and meets the highest international standards for non-combustibility (EN 13501-1 A2-s1,d0).
- Common Use: Mandatory for high-rise buildings, public transport hubs, hospitals, and other high-risk structures in strict jurisdictions.
