John from Oh writes
The absolute best indoor/outdoor spider spray is Onslaught Fastcap. This one-of-a-kind formulation is made of Exponent brand synergist, Esfenvalerate, and Prallethrin. Onslaught FastCap Spider and Scorpion Insecticide can be applied in a number of areas both indoor and outdoor, as well as food-handling areas (see Label for complete list).
Answer last updated on: 05/22/2018