Best material to cover a Faraday box
aluminun is good but ideal is lead
The best material to cover a Faraday box is aluminum. This is because aluminum is a good poor conductor of heat. It is also a metal's low density and it capable of resisting corrosion. It is a good electromagnetic material.
The best electrical conductor is silver, however, aluminum has excellent conductive value and is capable of forming a "Faraday shield". Electricity, like water, seeks the path of least resistance.