Rentokil insectrol insect killer 250ml is a surface spray insecticide for use against fleas ants bedbugs and other insects in the home this insect killer can also be sprayed into cracks and crevices where insect activity is seen to give long lasting insecticidal protectionwarningflammable dangerous to the environment keep out of reach of children and always read pack instructions active ingredient permethrin 046 ww d allethrin 013 ww