You use pepper sprays in order to protect yourself from external attacks. First of all the entire oil component in the pepper is extracted using very high pressure and the dry pepper component is used as the active component in pepper spray composition. Thereafter the pepper is diluted to reduce the SHU or Scoville Heat Unit so that it is at a manageable level. Normally the manufacturing Companies keep the SHU level at two million.

You do not have a fear with other electronic gadgets like the Talon mini 80,000 volt sun gun that requires contact but the ingredients does not perish. You also do not have such fear that your components will be exhausted in case of self defense products like the digital surveillance camera that would be fixed somewhere on your boundary walls or rooms and take photographs of those who would try to interfere or intrude into your premises. Of course in these cases you may need to recharge the battery or after a pretty long time replace them but it would be nothing like the situation you encounter with the pepper sprayers when your spray gel or liquid inside the sprayer has been exhausted or dried up rendering you defenseless.

This is exactly the reason as to why most of the manufacturing Companies print an expiry date on the mace pepper spray or any other pepper spray you might be using.