A mixture of fuel and oxidizing agent that reacts to produce a high-energy stream of product gases that can produce thrust. For examples, see What makes a good rocket fuel? A compressed gas used to push a material through a nozzle, forming an aerosol or a foam. For example, nitrogen or propane are used as propellants for shaving cream; nitrous oxide is used as a propellant for whipped cream.

The component of an aerosol spray that acts as a forcing agent to expel the product from the aerosol canister.

An explosive substance used to fill spray cans; commonly hydrocarbons or chloroflurocarbons.

the primary delivery system for aerosol hairsprays and mousses; examples include butane, isobutane, propane, and hydrofluorocarbon.