Generally, after an application of Bifen IT it should take anywhere between 30 min - 1 hour to dry. After the treated area has completely dried it is safe for the pets to re-enter.
Bifen IT is labeled for springtails and should work well to help you get rid of them. It does not kill on contact. The amount of time it takes for a springtail to die after coming into contact with a treated area will depend on a number of factors such as how healthy the springtail is, what stage of life it is in, and how long it spends in contact with a treated surface. It could take anywhere from a couple of hours up to a full day. Also, keep in mind that if you are not treating the main nest, and only the satellite colony, you are only be temporarily fixing your problem. More will appear as they continue to migrate. Springtails are attracted to areas that are high in moisture so if there is a moisture issue this will need to be identified and addressed as well. Until the moisture is gone or the main nest is found and eliminated, you will have an ongoing battle with this pest. You may want to look over our Springtails Treatment Guide for more tips and information.
You can treat with Bifen IT up to three feet away from the well per the product label.
Bifen IT is still the most cost effective professional grade general insecticide on the market. Mix at 1 oz. per gallon of water.