Mortein PowerGard Cockroach & Crawling Insect Control Bomb 3 x 125g protects and controls for up to 9 months against cockroaches, spiders, ants, silverfish and moths. Kills cockroaches, fleas, spiders, silverfish, moths, ants and crawling insect infestations. on non-porous surfaces Do-it-yourself! Just place and set: ·Locking tab releases the can contents as a fine mist that kills existing insect infestations where they hide ·Can be used in the kitchen, bedrooms, garage, shed, attic, under the house, caravans . Room can be re-entered 2 hours after treatment