I have spiders in and on my house. Which product is better for killing them, Cyper WP or Demon WP?
Cyper WP is the generic of Demon WP. Both products contain the same active ingredient in the same concentration. Cypermethrin, the active ingredient in both Cyper WP and Demon WP, is known to be one of the most effective active ingredients for spiders and other hard to kill insects. You might also want to check out our spider control kit, which comes with all the products you need to effectively control spiders.
Answer last updated on: 05/19/2010