Cayenne pepper. Cayenne pepper is recommended for its spiciness and ability to irritate the eyes. You won’t need a lot of it to get it to work; two tablespoons of it will give you enough for several sprays’ worth of mixture. 92% alcohol and vegetable oil. These will be used to mix with the cayenne pepper into a sprayable substance.

Alternatively, instead of using powder, you can grind peppers up yourself and add them to the mix. Even if you want to make more than two tablespoons’ worth, it’s a good idea to begin with this set proportion. That way, you’ll get a hands-on idea of a good pepper spray’s texture and consistency.

Baby oil is a viable alternative to vegetable oil.

Soap is a known irritant that many add to their homemade pepper sprays. [5] X Research source If you’re considering adding anything else into your pepper spray mix, you should make sure that it won’t cause permanent damage if it comes in contact with someone’s eyes. Pepper spray is intended solely as a non-lethal method of self-defence.

Filtering the mixture as such will help prevent clogging the nozzle with sediment after use.

An empty deodorant can. Make sure it has its safety cap on, and that the can is free of any puncture marks. It’s a good idea to clear out the deodorant can as much as you can before adding in pepper spray. A tire valve. A tire valve will add pressurization to your can after the spray’s been added. These can be bought at department stores and auto repair shops. A drill. An electric drill will allow you to open a hole in the bottom of the spray can. Aim for a 9mm drill bit. [9] X Research source Epoxy. You will only need a few grams of the putty to A syringe or funnel. An air compressor. Because you’ll be using a tire valve to pressurize your can, a car tire air pump should work for this purpose.

Alternatively, you can avoid the can process altogether by using capped spray bottle. You should take lengths to make sure that the spray has no chance of getting out however. Tape the head and nozzle shut when it’s not in use.

A funnel is a solid alternative in lieu of a syringe. [12] X Research source

It’s a good idea to wear a set of gloves while handling epoxy.

Make sure you push the tire valve most of the way in. It needs to be able to poke past the epoxy through to the other side.

Spray painting a can black will make it more concealable. Adding a decal can make your homemade can look more professional. It helps to state clearly on the can what it is.

Most pepper spray cans have an effective range of about 10 feet. [16] X Research source The effects of pepper spray last from 45 minutes to an hour. However, lingering effects will last up to three hours.

Just as importantly, keep the spray out of reach from others.