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 Gel Sticky Pepper Spray 9 oz model with Pistol Grip. Covers the target in a sticky, colored gel; that renders them temporarily immobile and covered in dye for easy identification. Contains 38 one-second bursts with a range of 20 ft.