Q: What’s the difference between non-aerosol and aerosol hairspray? What does each of them do? Which one is better?
A: When it comes to function, hairsprays are all the same. At least, they serve the same functions: to hold the hair in a specific style by using resins and polymers that “glue” the hair into place. The precise
formulas will vary from light hold to very-strong, humidity-resistant sprays. There are those designed to hold without becoming stiff and sticky, and those that will make the hair rigid and windproof.
The terms “aerosol” and “non-aerosol” refer to the delivery systems of the hairspray. Technically, an “aerosol” is a suspension of fine particles (solid or liquid) in a gas. As it
regards hairspray, an “aerosol” is packaged in a container under pressure and a release valve is used to emit the pressurized suspension into the air in a mist propelled by said gas. With an aerosol, you can usually
get a continuous emission of the suspension as long as the gas and/or particles last.
“Non-aerosol” hairspray is packaged as a liquid, usually in a bottle with an atomizer attachment (such as a pump-sprayer). The pump sprayer uses springs, valves and tubes to mix the
liquid with small amount of air and emits the liquid as small droplets propelled in short bursts. Unless the pump mechanism malfunctions, you can generally use the non-aerosol hairspray until the liquid inside is used up.
There are different schools of thought as to which is better when talking aerosol versus non-aerosol hairsprays. Aerosol sprays used to commonly contain compounds which were released
into the atmosphere as spray cans were used. These were referred to as Chloro-flourocarbons and the chlorine and bromine in these compounds were harmful to the ozone layer of our atmosphere. Because of this, aerosol
hairspray gained a negative reputation temporarily.
Today’s aerosol hairsprays have no chloroflourocarbons, and do not affect the ozone layer. Because of this, the choice between aerosol and non-aerosol hairsprays is largely a matter
of preference. Just bear in mind that aerosols can generally provide a finer mist of hairspray in delivery, and this can be better suited to certain hair types and finishes (namely fine hair types and soft,
high-volume looks). Non-aerosols offer more control and generally longer-lasting product (meaning it doesn’t get used up as quickly) and are great for styles that are meant to be very structured and sleek or
defined (such as using it to smooth stray hairs in a braided style, or to add definition to curls).