Each 0.3 oz packet of Demon WP is used in one gallon of water. Two 0.3 oz packets can be used in one gallon of water to eliminate harder to kill insects.
Yes, Demon WP Insecticide is labeled for centipedes and sod webworms. Please take a few moments to review our treatment articles on How to Get Rid of Sod Webworms and Centipedes for more information.
You do not need to be licensed to purchase or treat your own home/property with Demon WP Insecticide. If you plan to treat another home (ie neighbor, family, friends house etc) then you need to be licensed within your state first.
No, Demon WP is not labeled for booklice.
Demon WP Insecticide cannot be applied to animals. We do carry Happy Jacks Kennel Dip II which is labeled for mange mites.
Yes, Demon WP can be used to control millipedes and dozens of other common crawling and flying pests. Be sure to check for ways to reduce moisture buildup in the environment to create an environment less favorable for these insects, such as pulling back groundcover and trimming plants near the foundation of structures.
Demon WP Insecticide is not labeled for lice or to be applied for furniture. Steri-Fab Insecticide would be a better option. It can be applied to couches, chairs and other upholstered furniture.
No, Demon WP should be used within 24 hours after being mixed with water.
Cynoff WP is actually a generic version of the Demon WP Insecticide. Both products contain the same active ingredient and work the same way.
Please take a moment to look over our guide on How To Get Rid Of Roaches for advice on the best ways to treat and prevent roaches.
Demon WP should not damage limestone or any rock or other surface. Demon WP does leave a visible white residue on darker surfaces, but that should not leave any permanent stain. We recommend testing a small area first if you are concerned about this residue.
Demon WP Insecticide is not a contact kill; this product is a residual and can take up to one week before seeing results. We would suggest doing treatments every 21 days while treating for an active roach infestation.
Please take a look at our Roach Guide for tips on how to treat and prevent roaches in the future.
The current price for Demon WP Insecticide is $8.99 per envelope, or $94.80 for a box of 12 envelopes.
Using diluted Demon WP after it has been mixed 24 hours or longer would not be advised. The reason being is that the active ingredient will start to break down and cause the solution to become less effective. You can pour the old mixture outside, right up against the foundation of the structure you are treating.
Animals should always be kept out of the area where Demon WP is being applied until the area has completely dried. If you think that a pet or other animal has come into contact with a treated area that is still wet, it would be best to contact the manufacturer directly for advice on what action should be taken. You can reach Syngenta by calling 866-796-4368.
We generally recommend cleaning surfaces before applying residual insecticides such as Demon WP. If you are scrubbing an area with soap and water or other cleaning products, then you would also be removing the residual insecticide, so you would not clean those areas after spraying unless you also want to remove the insecticide or plan on retreating again soon. Keep in mind that Demon WP should be used indoors only as a spot or crack and crevice spray.
Demon WP Insecticide will take approximately 1-2 hrs to dry if applied according the product label.
We do not recommend that your child eat the food that fell into the treated crevice that was recently treated with Demon WP Insecticide. Have the product container, label or Safety Data Sheet with you when calling Syngenta (800-888-8372), a poison contol center or doctor, or going for treatment if needed.
Demon WP Insecticide is not labeled for scabies. Scabies mites live on/in the skin and we do not carry anything to treat humans. Most folks need to visit their doctor to receive the medication needed to get rid of scabies. You may spray your furniture with a product such as Steri-fab to kill anything on furniture, though treating the home is usually not necessary.
Depending on the size and health of the fly and the amount of Demon WP it contacts, it generally would take anywhere from a few minutes to several hours for an insect like a fly to die after contacting an area treated with Demon WP. For a very quick kill for flying insects, we recommend Maxforce Fly Spot Bait or Alpine Pressurized Fly Bait.
Demon WP is not labeled to control pantry pests, although it would likely kill any that contacted it. For the best control of a stored product pest such as the red flour beetle, it is really essential to keep looking for and to locate that initial source to get full control of the infestation. You can then vacuum and clean infested areas, treat cracks and crevices with a residual insecticide, and use traps for the adult insects. Gentrol Complete is a great spray to use since it includes both insecticide and Insect Growth Regulator (IGR) in one product. You can use GreenWay Pantry Patrol Traps for a pheromone trap.