When you spray a spider how long before he dies?

The time it takes for a spider to die after being sprayed with insecticide can vary depending on the type of spray used and the spider species. Generally, most insecticides can cause paralysis and death within a few hours to a couple of days. However, some Spiders may survive longer if they are not directly hit or if the insecticide is less effective against them. Always follow the instructions on the product label for safety and effectiveness.