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Demon WP Insecticide

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Demon WP Insecticide is one of the most popular do it yourself pest control products available to buy. It is a cypermethrin insecticide powder that has no odor and a great residual. When applied properly Demon WP controls brown recluses, roaches, and many other insects. It is recommended to only use Demon WP on light colored surfaces as it may leave visible residues on darker surfaces.

Target Pests

Demon WP Insecticide will kill and control Ants Aphids Boxelder Bugs Centipedes Chiggers Cockroaches Crickets Earwigs Firebrats Fleas Flies Mites Mosquitoes Pillbugs Silverfish Sowbugs Termites Bees Carpenter Ants Carpenter Bees Fire Ants Sod Webworms Spiders Ticks and Wasps.

For Use In

For use as a general surface crack-and-crevice and/or spot treatment for residual and contact pest control in on and around buildings and structures and their immediate surroundings and on modes of transport. Permitted areas of use in nonfood/nonfeed areas include but are not limited to aircraft (cargo and non-cabin areas only) apartment buildings boiler rooms buses closets correctional facilities decks entries factories fencing floor drains (that lead to sewers) food granaries food grain mills food manufacturing processing and serving establishments; furniture garages garbage rooms greenhouses (non-commercial) hospitals (non-patient areas) hotels and motels houses industrial buildings laboratories landscape vegetation locker rooms machine rooms mausoleums mobile homes mop closets mulch nursing homes offices patios pet kennels porches railcars restaurants storage rooms schools sewers (dry) stores trailers trees trucks utility passages vessels vestibules warehouses wineries and yards. Food-Handling Establishments.


A general surface, crack and crevice and/or spot treatment for residual control. Use between 1-2 packets (Envelopes) or 1-2 scoops(Tubs) per gallon of water for a concentration of 0.1%-0.2% of active ingredient. Demon WP leaves a white powdery film that is especially noticeable on dark surfaces.Use D-Fense SC Insecticide too avoid visible residues

Coverage Area

One envelope of Demon WP will make up to 4 finished gallons of Cypermethrin spray treating 4,000 square feet or approximately 2 averaged size houses. Each pound of Demon WP will make up to 48 gallons of finished product.

Time to Kill

Demon WP will begin killing insects in 5 minutes and continue providing pest control for 3 to 5 months.

Mix Rate

Each foil envelope of Demon WP in Water-Soluble Packets contains water-soluble packets of Demon wettable powder. The foil envelope must be opened for use. Because water-soluble packets readily dissolve in the presence of moisture, do not allow them to get wet before adding to the applicator tank. 

Active Ingredient

Cypermethrin 40%

Demon WP Insecticide

Product Q & A

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Browse 10 questions Browse 10 questions and 12 answers
Can I use demon in my kitchen and with a dog in the home?
Renee on Aug 15, 2017
BEST ANSWER: Yes, you can use Demon WSP in the kitchen you will want to use according to label and avoid apply in places not allowed on label.

A general surface, crack-and-crevice and/or spot
treatment for residual and contact control of ants,
carpenter ants, cockroaches, crickets, spiders and
other insect pests.
Fleas, outdoor and indoor?
A shopper on Aug 12, 2017
BEST ANSWER: Demon WP will kill fleas both indoors and outdoors. You can broadcast it outdoors but indoors it is only for crack and crevice application. For a broadcast treatment indoors we recommend Novacide and guarantee it will control all indoor fleas 100%. I use it twice a year in my house and have not had any fleas in 5 years. It also kills roaches, ants, and spiders.
Novacide Flea & Tick Killer
Novacide Flea & Tick Killer
I have about 15 Cicada Killers holes. How much Drione dust do I need?
I this product better that Demon WP for Cicada Killers?
Ral R on Aug 22, 2017
Demon WP Insecticide
Demon WP Insecticide
Drione Dust
Drione Dust
BEST ANSWER: It would be better to use the Demon WP to spray the openings you will have to get the chemical down in the holes.

Drione dust will not hold up with moisture and it is always recommended to use D-Fense Dust outside or in heavy moisture areas. https://www.solutionsstores.com/d-fense-dust
Where can you buy it?
A shopper on Feb 19, 2018
BEST ANSWER: You can buy it directly from Solutions Pest and Lawn, online and the item ships same day, for free with typically a 2 day delivery time.
So it is kid and pet safe?
A shopper on Aug 20, 2017
BEST ANSWER: Yes, Demon WSP is safe to use in homes that have children and pets. You will want to keep them out of the area during application and until it is completely dry.
will it kill or deter scorpions?
Terri on Jul 23, 2017
BEST ANSWER: Yes, Demon WP, when applied in areas that a scorpion would come across the surface will work well to control Scorpions.
Will this product kill gnats
Nikki on Jul 7, 2017
BEST ANSWER: Demon WP. would kill gnats if them come income in contact with the areas that have been treated. There maybe better options to control gnats, depending on where the issue is located.
for fleas is there a method for complete yard coverage? If so, how long do my pets need to wait before going back into the yard?
Jeff on Jun 29, 2017
BEST ANSWER: We recommend 2 products for outdoor flea control, one use permethrin SFR, and really get the soil wet when applying, fleas will be in the top layer of the soil. Then after you have control, apply bifen granules, this will get you an entire season of control.



Will Demon WP kill the tiny red Clover Mites that are infesting my back cement patio?
Hammer614 on May 9, 2017
BEST ANSWER: Bifen IT would be a better option for controlling Red Clover Mites, it will solve the problem, spray the surface till run off with 1 ounce of Bifen IT to 1 gallon of water. https://www.solutionsstores.com/bifen-it-insecticide
Is it safe to spray inside with pets around.
Larry on Jun 2, 2016

Customer Reviews

5.0 / 5.0
30 Reviews
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5.0 / 5
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Safe to Use
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Would you Recommend?
Yes (1)
Easy to Use
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5 / 5
Safe to Use
5 / 5
Would you Recommend?
Good spider control
I have found Demon WP to be very effective in controlling spiders around the house. Spiders are the one thing that we have in and around out South Carolina home. When spiders start to appear around the home, one application of Demon WP under the siding at the foundation keeps them out for several months. When it dries it leaves a powder, so I have not used it inside except for the garage.
November 2, 2017
5 months ago
Property Manager
Iâ??ve been using this for years! Iâ??m into maintenance and property management. Itâ??s saved us a lot of money and has gotten rid of ants and roach infestations.
October 22, 2017
5 months ago
Knock em dead
As far as getting rid of ants,demon is the best I've ever used. Keep up the good work. Thanks!!!
September 14, 2017
7 months ago
Best Product By Far!
Don't let the price fool ya! This stuff is A#1 when it comes to killing fleas and any other insect you want to get rid of. Very very good product.
June 26, 2017
Love this stuff
With kids so easy to control ununwanted pest in my house...lo
October 12, 2016
bug dust/spray
came in quickly, great product
February 13, 2016
Excellent flea killer.
Tried Demon a few years ago because of a flea problem and Demon killed all the fleas, inside & outside. Continues to kill fleas and everything else for months. 98% smell free and safe for inside use. Very good product.
January 10, 2016
Works great
I've been using this product for a long time. So long I forgot how many years. It works great both inside and outside around the house. I'm glad I found y'all because it was becoming cost prohibitive for me to go to the local farm and ranch store. Y'all made it possible for me to save enough money to buy my annual amount of Demon WP. Thanks a bunch. Now if I could get a recommendation for a product that would deter varmints such as skunks, 'coons, possums from digging under my house I would appreciate it. Thanks again.
November 2, 2015
Been using this for awhile works so great
October 9, 2015
The Best Product I have experienced!
I have never even used up the whole product and it eradicated all annoying pests in our house! I only used one package from the three that was sent to me. Great product at a low price! Free shipping as well~!
October 7, 2015

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