Petroleum based waxes and wax blends can be applied to numerous surfaces to reduce unwanted penetration or interactions of numerous liquids (water, grease, etc) and gases (oxygen, etc.).

Paraffin wax,  colourless or white, somewhat translucent, hard wax consisting of a mixture of solid straight-chain hydrocarbons ranging in melting point from about 48° to 66° C (120° to 150° F).  

Paraffin wax is obtained from petroleum by dewaxing light lubricating oil stocks. It is used in candles, wax paper, polishes, cosmetics, and electrical insulators.  

It assists in extracting perfumes from flowers, forms a base for medical ointments, and supplies a waterproof coating for wood.

In wood and paper matches, it helps to ignite the matchstick by supplying an easily vaporized hydrocarbon fuel.