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What are the strengths of pepper spray? The strongest concentrations are 15% active ingredients and rated at 2 million scoville heat units. The high scoville heat rating is more important than the percentage of pepper spray ingredients.
Wildfire 18% pepper spray is hot, hot, hot. Wildfire is 18% Oleoresin Capsicum (OC)...a derivative of 3 Million Scoville Heat Units (SHU). Wildfire pepper spray comes in five sizes: 1/2 ounce, 1.5 ounce, 4 ounce, 9 ounce and 16 ounce.
There much more stronger pepper sprays on the market.