Natures Element Web Out Thyme Oil 2.0% Lemongrass Oil 2.0% Citronella 2.0% Sodium Lauryl Sulfate 4.5% Web Out works in homes, offices, warehouses, school and other buildings on metal, wood, brick and most other surfaces. Web Out is safe and effective to use against spiders ants crickets mosquitoes cockroaches and other general pests.