Spiders are not insects, they are arachnids. Hot Shot Spider and Scorpion Killer has been formulated to control spiders with a unique fast-acting combination of ingredients that knocks down and kills spiders quickly. The formulation is water-based, and non-staining, making it an effective solution for both indoor and outdoor use. Spiders typically need to be sprayed directly to be killed as their long legs keep their bodies from coming in contact with treated surfaces. Spiders are likely to be found near their primary food source, insects and other small arthropods, so control of insects in and around the home is an effective means of reducing spider populations. Also, kills black widow, brown recluse and wolf spiders.