Special foam formula to be used against wasp nests and cavity nests both indoors and out. To combat wasps, one should spray the nest entrance, usually located at the bottom of the nest, and the inside of the nest for a long time. This treatment should be performed at night, when all the wasps are in the nest and the possibility that flying wasps are present is very low. Treated areas should be ventilated thoroughly. Not to be applied in places in the vicinity of very young children (aged 0 - 4 years).