Vet-Kem Acclaim Household Flea Spray Vet-Kem Acclaim Household Flea Spray contains permethrin & s-methoprene to kill fleas & flea eggs & larvae around the home. It is effective against adult fleas for 6 weeks & prevents flea eggs & larvae from developing into adult fleas for 12 months. Vet-Kem Acclaim is also licensed to kill house dust mites, a common cause of allergies in humans & pets, & is effective against ants, cockroaches, ticks & spiders. One can of Vet-Kem Acclaim Household Flea Spray is sufficient to treat a surface area of 140m 2 (1200 ft 2). In order to be effective, it is vital that Vet Kem Acclaim is used in all areas that your pet has access to, but must not be applied to animals.