PT Ultracide Spray contains Permethrin and Phenothrin to kill adult fleas fast. It also contains an insect growth regulator (Pyripoxyfen) to prevent reinfestation for up to seven months. Pyripoxyfen penetrates deep into the base of carpet and upholstery fibers, where pre-adult fleas live and targets fleas in the egg and larval stages of development, preventing them from producing new infestations of breeding, biting adults.
While the insect growth regulator in PT Ultracide will continue to work for up to 7 months, it is recommended to re-apply PT Ultracide after 14 days if new fleas continue to emerge. This will increase knock-down of new adults. Preparations and cleaning such as vacuuming thoroughly before and after treatments will also greatly affect the success of controlling fleas.