Here's why:

* Structure: Wax is composed of long hydrocarbon chains, which are non-polar molecules. These chains are tightly packed together, making it difficult for electrons to flow freely.

* Lack of free electrons: Insulators have very few free electrons that can carry an electrical current.

* High resistance: Wax has a high electrical resistance, meaning it strongly opposes the flow of electricity.

However, there are some caveats:

* Types of wax: Different types of wax can have varying properties. Some waxes, like beeswax, can be slightly conductive depending on impurities or moisture content.

* Temperature: The conductivity of wax can be affected by temperature. At very high temperatures, some waxes may become slightly more conductive.

In general, though, wax is considered a good electrical insulator and is commonly used in electrical applications for insulation purposes.