It is made from polyethylene (PE), plastic sandwiched between two very thin sheets of aluminium.

What was the Grenfell Tower cladding made of?

Aluminium composite material (ACM) panels – a layer of highly combustible plastic called polyethylene held between two thin aluminium skins. It formed the shiny outer layer of the cladding system. Polyethylene is a ferociously combustible plastic which has been compared to solid petrol by experts.

What is cladding made of?

Cladding panels can be made from a wide variety of materials such as wood, metal, brick or vinyl, and are often coupled with composite materials that can include aluminium wood blends of cement and recycled polystyrene wheat rice straw fibres.