Kill spiders on contact with Terro 16 oz. Spider Killer Aerosol spray. Active ingredients Pyrethrins & deltamethrin combine to give rapid knockdown with extended killing power. Use the spray indoors or outdoors as a general surface, spot or crack & crevice treatment to areas where pests crawl & hide. Spray spiders directly when possible, or use the spray to kill ants, silverfish, cockroaches, scorpions, ticks, crickets, centipedes, Asian Lady beetles & bedbugs, to name a few.