Raid Max Ant & Roach, 14.5oz, Pack of 6 Roach Spray kills bugs on contact and keeps killing with residual action for up to 6 months Kills Ants, Crickets, Roaches, Silverfish, Spiders, and Waterbugs Our two-way roach spray helps you apply spray in those hard-to-reach places or cover a wide area To maintain control on plywood surfaces, re-treat every four weeks. On all other surfaces, re-treat every six months Use attached applicator wand, spray cracks around the baseboards and other hiding places until wet