Marketing is full of tricks. Publicity is tempting. But be strong my friends! Resist!
When you think an aerosol suits for your application, estimate how much product you will need in 1 or 2 years. Buy an aerosol with content closest to your 2-year need.
Aerosols often have a long shelf life from 2 to 6 years from production date.
But even when an offer of “50% Free” looks attractive, you will end up by throwing away most of the product. In that way it becomes an expensive product. It will also have a considerable impact on the environment.