If you're looking for ways to keep yourself and your customers and buildings safe during potential break-ins and robberies without risking damage to anyone or anything, then what you want is non-lethal options for your security guards. This will help you retain your security guards since there's a 400% turnover rate in the industry. Guards will tend to stick around longer if they feel like they can do their jobs without risking themselves.
Pepper Spray Pros and Cons
Pepper spray has almost no serious negative effect on objects at all, and its effects on most people are temporary. It depends on exactly what's used, but the common ingredient includes capsicum. It will usually wash out in about 30 minutes of constant exposure to water, but it will leave the victim unable to see anything, even if they aren't affected by the intense pain.
This is especially useful if you need to staff security for areas where you're expecting heavy drug use such as for at-risk college campuses. Those who are high enough on drugs may not even be able to feel methods of deterring them that rely only on pain. However, pepper spray has the advantage of causing the eyes to swell up so that they just don't work in a mechanical way anymore.
The downsides of pepper spray is that it tends to have a short range and it only works if it hits the target in the eye. Some pepper spray options use a "wall" approach that makes the spray hang in the air so that it only hits people who walk through it. Others spray a gel stream that you have to aim correctly.
Tasers and Stun Guns
Another option for keeping security guards feeling safe so they don't turnover when something happens is to use electric approaches. Tasers shoot prongs that hit into a target and then deliver an electric current from one prong to another.
Again, this can help security guards feel safer to have since it works in a largely mechanical way. The target simply loses control of their body since the electricity interferes with their commands to their own limbs. In most cases they simply fall over and spasm, unable to continue the fight not because pain was distracting them, but because their body simply doesn't work in the normal way anymore.
Stun guns are similar except they require up close physical contact since the prongs are just on the end of the device. The main downside is again range, as well as the fact that guards have to hit the prongs correctly for it to work. But the pro is that this will stop an attacker without directly hurting them in a mechanical way.
Overall, these non-lethal approaches work in a mechanical way that can help guards feel safer since it will stop even those who ignore pain entirely from hurting them.
Contact a security company, such as Palisade Group Security Service, to find trusted guards that can handle these strategies.