How long does a bug spray last like the 20 foot Raid for wasp hornets etc?

Question

I sprayed this stuff as far into the air as I could and into the window opening that I saw bees going into and around the windows. I was wondering how long it will last, as the bee activity has been low (or it could be because it has been rainy) and will they return?

Answer 1

Jamadu it will loose its effectiveness in less than one hour after being sprayed outside with sun, and rain it will not last. Some wettable powder insecticide will last for days. This is bought in powder and mixed with water and sprayed

Answer 2

I keep a back up sprayer just in case.