You normally mix Cy-Kick CS at the rate of 1-2 ounces per gallon of water, and each gallon you mix up will cover roughly 1000 sq/ft, depending on how heavy you wet the surface area.
Yes, Cy-Kick CS can be used indoors and outdoors for springtail control. Spring tails can be tough to eliminate because they reproduce very quickly. In almost every case where people have spring tails they also have a moisture problem such as a leaking or sweating pipe, poor ventilation in their crawl space, lots of wet mulch right up next to their structure, etc. You must locate and correct the moisture problem to get rid of the spring tails, insecticides alone will not do the job. You may want to look over our article on How To Get Rid Of Springtails for more information on treating and preventing this pest.