What are the Materials to Good Heat Insulators?

Asbestos cloth

Balsa wood

Calcium silicate

Compressed straw

Cork

Cotton wool

Diatomaceous earth

Diatomite

Expanded polystyrene

Felt

Glass fiber and foam

Glass wool

Hardboard

Magnesia

Mineral wool

Plywood

Polyurethane foam

Rock wool

Rubber

Sawdust

Wood

Wood wool