Demon® WP is one of the best professional insecticide that's perfect for crack and crevice and/or spot applications. When it comes to controlling cockroaches, ants, spiders, and other insects nothing beats the dependability of Demon® WP. With its convenient packaging and easy-to-mix formula, Demon® WP provides quick knockdown and long lasting residual activity on a variety of surfaces, both indoors and outdoors. Demon® WP is also labeled for the control of more than 30 other pests. Demon® WP comes in a envelope that has four water-soluble packets (quick and easy way to make 2 to 4 gallons of insecticide) or a 1lb. Jar that can make 24 to 48 gallons of finished solution.