CyLence Ultra is a pest control concentrate that kills more than 60 pests, including flies, ants, spiders, darkling beetles, mosquitoes, fleas, ticks and more. It can be used indoors and outdoors with a user friendly, flexible application and is for premise use only in and around livestock facilities. CyLence Ultra Pest Control Concentrate is a 5th-generation pyrethroid (beta-cyfluthrin) that provides insecticidal activity in a concentrated liquid formula. Concentrate makes two gallons of spray, enough to treat 2,000 sq. ft.