Virbac Indorex Household Flea Spray One of the UK's bestselling veterinary household flea sprays, Indorex Spray is now licensed to kill house dust mites as well as fleas. Indorex Spray will keep your home free of fleas for a full 12 months. Not only does it kill adult fleas & dust mites, it also prevents the development of their eggs & larvae, thus breaking the flea life-cycle. It is the only veterinary household flea control proven to be stable in UV light. Indorex Spray is approved by the Health & Safety Executive for the control of House Dust Mites. These are the main allergens involved in atopic dermatitis in dogs & are often implicated in asthma in humans. Just one appication will provide control of House Dust Mites for 12 months, but as dead mites are just as allergenic as live ones, it is essential that a high power, high filtration vacuum is used regularly to remove the dead mites. Indorex Spray is odourless & does not normally stain. At the HSE recommended application rate of a 5 second burst per square metre, each can of Indorex Spray will cover 80m 2, which is more than sufficient for a 3 bedroom semi (55m 2 to 74m 2 according to estate agent statistics). Active Ingredients Permethrin: an insecticide that quickly & effectively kills adult fleas. Pyripoxyfen: a long-acting Insect Growth Regulator (IGR) that prevents flea eggs & larvae from developing into adults. Piperonyl Butoxide: a synergist that reinforces the activity of permethrin.