Leovet Power Phaser Durative Gel Fly RepellentFly repellent gel for the absolute protection of sensitive parts of the body. Power Phaser Durative is an insect repellent gel with an especially high concentration of active ingredients which protect the horse against mosquitoes, horse flies, flies and ticks, even during perspiration. The sponge included allows the gel to be applied easily to tender parts of the body and sensitive horses, without soiling the hands.