Absorbine UltraShield EX 32oz Sprayer Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises

https://www.amazon.com/Absorbine-UltraShield-Residual-Insecticide-Repellent/dp/B000MCZVXC/ Was at the top of my first reply. I've gotten it mostly at Tractor Supply, but got it from Amazon at least once.