Brian Skyberg, owner of South Dakota Safety - Self Defense Products, wanted to test the truth behind Wildfire 18% Pepper Spray. As you can see in the video, Wildfire was definitely effective. It took almost 2 hours for the effects to wear off and still burned after 2 showers... Avaliable for purchase at- www.sdsafetystore.com Wildfire 18% pepper spray is hot, hot, hot. Wildfire is 18% Oleo Resin Capsicum (pepper)...a derivative of 3 Million Scoville Heat Units (SHU). Wildfire 18% pepper spray comes in 5 sizes- 1/2 ounce, 1.5 ounce, 4 ounce, 9 ounce and 1 pound.