Aerosol can actuators are the most overlooked part of an aerosol can.

Usually, people only pay attention to them when they’re no longer working. But the actuator is a vital part of an aerosol can and should be treated as such.

The actuator is the part of the can that dispenses the product. There are different types of actuators that are used for different product consistencies. An actuator meant for a liquid product is not going to be very helpful when attached to a can full of shaving cream.

How the Actuator Works
The actuator controls the fineness of the product spray, as well as the amount of product that is dispensed. When you press down on it, the valve is opened. When the valve opens, the pressure is released from the top of the aerosol can and the pressurized propellant tries to escape from the can. However, the product filled bag prevents the propellant from escaping, so instead, the propellant pushes on the bag and forces the product out of the actuator.

Signs the Actuator is Broken
If there is clearly a significant amount of product in the can, but it won’t come out, then the problem is most likely the actuator. Another indicator is if the product comes out in drips and not a spray, or the product does come out in a spray, but does not atomize properly. Signs of a poorly atomized product include uneven coverage, or if the product squirts or drips out instead of spraying.

Fixing a Broken Actuator
Most people assume that if the product isn’t coming out properly, then the actuator is clogged and try to clear it out with a pin. However, this will most likely make the problem worse. The best way to fix an actuator is by simply replacing it. It’s most effective to use the actuator from an empty can of the same product.
If you can’t easily remove the actuator, it’s best to cut your losses and buy a new can. In your attempt to remove the broken actuator, you could puncture the can or damage the valve which can cause serious problems.

Read our blog post on aerosol can safety for more information on why you should never puncture an aerosol can.