Apparent Insect and Spider Spray is a highly concentrated formulation Controls of a range of insect pests. Apparent insect and spider spray is very safe for use in all domestic, commercial, industrial buildings. 30ml makes 1 litre of potent controlled insect and spider spray. Simply spray near the windows, doors, walls etc and this will prevent the spiders and insects to enter. Active ingredient deltamethrin, Bottle has a convenient inbuilt measure