Hot Shot Spider and Scorpion Killer
For the longest lasting residual effect in a spray, choose Hot Shot Spider and Scorpion Killer. It is made with a synthetic pyrethrin derivative, that is mixed with two types of carrier oil substances that keep the active ingredient working for up to 16 weeks. Although this is one of the more expensive spray type of spider killers, if you have a severe spider problem and want to keep them from coming back, this may be the best alternative for that. Spray it on webs, on known spider paths, in cracks and crevices for unrivaled residual protection that can't be beat.