Many - rubber, plastic, ceramics, glass.
An insulator has several different meanings. The two most common are an electrical insulator and a thermal insulator. an electrical insulator would be polyethylene. a thermal insulator would be wool.
wood
It stops the flow of the electrical current.
The poorest insulator would be the best conductor, which is one of the noble metals. Bakelite is a fairly good insulator, not too long ago electrical fittings were made from it.
The most common electrical insulator is the plastic coating on electrical wires. Hope this helps!
Oxygen. Carbon as diamond is a good electrical insulator, (graphite is an electrical conductor), silicon is a semiconductor so has limited electrical conductivity and aluminium is a metal and a good electrical conductor.
the best insulator is plastic. a better insulator is rubber which is used for wires and other electrical lines
it depends what type of insulator youre talking about. wood is a good thermal insulator and rubber is a good electrical insulator A perfect vacuum is the best insulator.
rubber
Plastic Tubing.
An insulator or neither. The water inside of the sponge is what would conduct electricity.
P.V.C or polyvinylchloride. It's a plastic.