Demon WP Insecticide

$8.81 - $253.68

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Not for Sale to: NY, CT
NY residents, see our New York Pest Control page.

$8.81$45.99$44.37$95.52$253.68
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Demon WP Insecticide envelope(s) $8.81
Demon WP - 1 lb. Jar jar (1 lb.)

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Demon WP Insecticide - Box (12 envelopes)Demon WP Insecticide - Box (12 envelopes) case (12 envelopes)

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Demon WP 1 lb. Jar - CASE (6 jars)Demon WP 1 lb. Jar - CASE (6 jars) case (6 jars)

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For large order quotes, please call us at 1-866-581-7378.

Demon WP Insecticide

Demon WP is an excellent professional insecticide that's perfect for crack and crevice and/or spot applications for residual and contact control of Ants, Carpenter Ants, Cockroaches, Crickets, Spiders and many other insect pests. Demon WP can be purchased as either an envelope of four water-soluble packets (shown here) or a Demon WP 1 lb. jar (equal to 12 envelopes of Demon) with a scooper for easily making up to 48  gallons of solution. Demon should be applied with a sprayer.

The 1 pound size of Demon WP has been discontinued and is no longer being made by Syngenta. Cyper WP is available in a 1 pound jar and contains 40% cypermethrin – the same amount of active ingredient as Demon WP. It will last for years and years and is much cheaper when you buy in the 1 lb. jar.


Active Ingredient: Cypermethrin 40%
Target pests: ants, carpenter ants, cockroaches, crickets, spiders and certain other insect pests.
Application: Demon WP leaves a white powdery film that is especially noticeable on dark surfaces.
Yield: 1 envelope contains 4 water-soluble packets and makes 2-4 gallons of solution.

1 pound jar makes 24-48 gallons depending on the concentration rate that you use (see label for recommended rates). 1 jar is equal to 12 envelopes of Demon WP.
NOT FOR SALE TO: NY, CT
Manufactured By: Syngenta



How Demon WP Insecticide Works

Demon WP is a residual insecticide concentrate with the active ingredient Cypermethrin. Cypermethrin is in the synthetic pyrethroid class of insecticides. It is a man-made active ingredient that attacks the central nervous system of insects that come in contact with or ingest it. Demon WP is diluted with water and applied with a gallon pump sprayer. After it dries, Demon WP continues to work for up to 3 months.

Demon WP Target Pests

A variety of crawling and flying pests including (but not limited to) ants, boxelder bugs, cockroaches, crickets, earwigs, scorpions, spiders, and wasps

PESTS CONTROLLED WITH THIS PRODUCT: Ants, Aphids, Assassin Bugs, Bees, Boxelder Bugs, California Oakworm, Carpenter Ants, Carpenter Bees, Centipedes, Chiggers, Chinch Bugs, Cluster Flies, Cockroaches, Crickets, Earwigs, Elm Leaf Beetle, Fire Ants (Mounds), Firebrats, Fleas, Flies, Millipedes, Mites, Mosquitoes, Pillbugs, Scorpions, Silverfish, Sod Webworms, Sowbugs, Spiders, Termites (above ground only), Ticks, Wasps

Target Uses of Demon WP 

Demon WP (Water-soluble Packets) Insecticide is for crack and crevice and/or spot applications for residual and contact control of Ants, Carpenter Ants, Cockroaches, Crickets, Spiders and certain other insect pests. The Demon WP water-soluble packets make mixing and use very easy when used with a 1 gallon compressed air sprayer. (See our selection of sprayers in our Sprayers section).

Demon WP (Wettable Powder) is excellent for larger, tougher pests such as cockroaches, spiders, scorpions, or stink bugs because there is a high concentration of active ingredient. Demon WP is labeled for a wide variety of pests, however, making it an extremely popular general use insecticide for perimeter treatments outdoors or crack and crevice treatments indoors.

The wettable powder formulation also makes Demon WP ideal for porous surfaces such as concrete since the individual particles of active ingredient are larger and can more easily stay on top of the surface.

Demon WP leaves a white powdery film that may be visible on darker surfaces. For applications where this is a concern, consider using a liquid concentrate instead.

ACTIVE INGREDIENT: Cypermethrin 40%

Demon WP Insecticide Application Instructions

Each foil envelope of Demon WP Insecticide in Water-Soluble Packets contains four water-soluble packets of Demon wettable powder (WP). 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. 

Wear dry gloves when handling the water-soluble packets. Handle with care because excessive handling may cause rupture of the water-soluble packet. Unused water-soluble packets should be stored in the original foil envelope, folded over to minimize exposure to moisture.

Demon WP Insecticide in Water-Soluble Packets are intended for dilution with water for applications. For best results, dilution should be achieved if the following steps are taken:

1. Fill applicator tank 1/2 with water.
2. Add desired Demon WP Insecticide in Water-Soluble Packet(s).
3. Allow 1-2 minutes for dissolution of water-soluble packet(s).
4. Agitate, stir or shake applicator tank.
5. Finish filling applicator tank and agitate again before use to ensure satisfactory suspension.

Follow the above mixing instructions for Demon WP 1 lb. jar.

Note:
• Upon standing without agitation for more than 1 hr., the applicator tank should be agitated, stirred or shaken again to achieve satisfactory suspension.
• Make up only amount of application volume as required.
• This product should not be applied with oil.

Tank Mixing
Demon WP in Water-Soluble Packets may be tank mixed with other currently registered pesticides unless expressly prohibited by the product label. A small volume mixing test with the other products is recommended to ensure compatibility. Observe all restrictions and precautions which appear on the labels of these products.

*Repeat treatments as necessary, but not more than once every 7 days.

Always read the product label completely before use.

1 envelope contains 4 water-soluble packets and makes 2-4 gallons of finished solution.

1 pound jar makes 24-48 gallons of finished solution. 1 jar is equal to 12 envelopes of Demon WP.

Standard Application Dilution rates / Mixing Ratios for Demon WP:

*1 packet or 1 scoop (0.33 oz.)/gal. of water – 0.1% – maintenance, more frequent applications, foliar applications

*2 packets or 2 scoops (0.66 oz.)/gal. of water – 0.2% -- clean-out, severe infestations, exterior applications which receive greater direct sunlight, scorpions

*For Perimeter Barrier Applications around Structures – Mix 1-2 scoops of Demon WP in 1-5 gallons of water to cover 800-1600 square feet. Higher volumes may be needed for dense vegetation or landscaping materials.

*1 scoop is the equivalent of 0.33 oz., 9.5 gm., or 2 level tablespoons

Demon WP is for use in the following areas:

Demon WP is for crack and crevice 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 include, but are not limited to, industrial buildings, houses, apartment buildings, laboratories, buses, greenhouses and the nonfood/feed areas of stores, warehouses, vessels, railcars, trucks, trailers, aircraft (cargo and noncabin areas only), schools, nursing homes, hospitals (non-patient areas), restaurants, hotels and motels, and food manufacturing, processing and servicing establishments, food granaries, food grain mills, and pet kennels. Demon WP is also for use on lawns, ornamental trees and shrubs around residential, institutional, public, commercial, agricultural and industrial buildings, and parks, recreational areas and athletic fields.

Demon WP Authorized by the USDA for use in inedible product areas in Federally inspected meat, poultry and egg processing plants.

Indoors-

See above for complete mixing instructions.

Cockroaches, Spiders, Crickets, Scorpions, Silverfish, Ticks and Firebrats
Apply as a coarse, low pressure treatment to areas where these pests hide, such as baseboards, corners, storage areas, closets, around water pipes, doors and windows, attics and eaves, cabinets, sinks, furnaces, stoves, behind and under refrigerators, the underside of shelves, drawers and similar areas. Pay particular attention to cracks and crevices; also see Outdoor Surface Use on the product label.

Ants
Apply Demon WP to any trails, around doors and windows and similar areas where ants (including carpenter ants) may be found. Apply perimeter barrier treatments to prevent infestation as described below; also see Outdoor Surface Use on the product label.

Bees, Carpenter Bees and Wasps
Thoroughly treat nest and entrance, surfaces and surrounding areas with Demon WP where these insects alight; also see Outdoor Surface Use on the product label.

Assassin Bugs, Boxelder Bugs, Sowbugs, Pillbugs, Millipedes, Elm Leaf Beetle and Centipedes
Apply around doors and windows and similar areas where these, or similar perimeter pests, may be found or where they may enter premises. Apply to baseboards, storage areas, and other locations.

Outdoors-

See above for complete mixing instructions.

For Perimeter Barrier Treatments

To help prevent infestation of buildings, apply to a band of soil and vegetation 6-10 ft. wide around and adjacent to the building. Also, treat the building foundation to a height of 2-3 ft. where pests are active and may find entrance. Apply as a coarse spray treatment to thoroughly and uniformly wet the foundation and/or band area, using 1-5 gals. of treatment solution applied to 800-1600 sq. ft.

Outdoor Surfaces

Apply with either hand-held or power application equipment as a residual spray to surfaces of buildings, porches, screens, window frames, eaves, patios, lawns, refuse dumps, garages and other similar areas where these pests are found. Also, may be used as a spot treatment in applications to lawns in landscaped areas in and around residential, commercial, institutional and industrial buildings, and similar areas where these insect pests are active.

Fire Ants (Mounds)

For individual fire ant mounds, apply Demon WP as a drench. Gently sprinkle a total of one gallon over the surface of mounds up to 12 inches in diameter. Use 2 gallons for larger mounds. Thoroughly wet mound and surrounding area. Treat new mounds as they appear. Pressurized sprays may disturb the ants and cause migration. If possible, applications should be made on warm days after recent rainfall. All colonies in the vicinity should be treated, including those that have not yet constructed a mound.

Scorpions

Treat and remove accumulations of lumber, firewood and other materials that serve as harborage sites. Apply as a coarse spray treatment to the point of drip.

*Demon WP is not appropriate for applications using a hose-end sprayer.

*See product label for complete outdoor application instructions.
 

Demon WP Insecticide Features

  • Water-soluble packets are convenient and simple to use.
  • 1 lb. jar comes with convenient scoop for quick and easy measuring.
  • 1 lb. jar is very economical.
  • Pet safe after dry, when used as directed

Extra Tips

  • Some settling may occur after tank mixing Demon WP. Be sure to agitate the tank after resting, and only mix the amount of product you intend to use within 24 hours.
  • Store concentrate out of direct sunlight and extreme temperatures for maximum shelf life of 3+ years.
  • Not labeled for use on edible plants
  • Exposure to direct sunlight will break down residual more quickly, so applications may need to be made more frequently in these areas.
  • Repeat treatments as necessary, but not more than once every 7 days.
  • Demon WP is not suitable as a space spray with equipment such as misters, foggers, or aerosol equipment. The product will clog or damage the equipment and is not labeled for this use.
     

Compare to: Cyper WP, Cynoff WP

Rating Snapshot

5 stars   548
4 stars   63
3 stars   12
2 stars   10
1 star   14

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Average Customer Rating
4.7 star rating (647 reviews)

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Most Helpful Customer Reviews
  • 212 of 227 people found this review helpful:

    5 of 5 Stars  Phenomenal Product
    By Matt on June 2, 2009
    Verified Purchase

    Excellent product. I have been using Demon WP Insecticide for MANY years mostly for exterior barrier treatment and in and around garages. I was very impressed. I will never forget the first time I used this product. I sprayed a heavy line in front of our 3 car garage which was getting bombarded by all kinds of crawling insects. It created about a 10-12" line on a hot & sunny day and it dried very quickly. I did it a second time thinking it evaporated, again it dried within a few mins. Came home from work the next day and a solid line of dead bugs exactly where I sprayed. Was as if it was an invisible electric fence. At this point I was sold on this and nothing else. I have continued to use it for years without fail. I found it lasts quite a while but depends on how much direct rain the treated surface area gets. Recommend 100% 

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  • 192 of 199 people found this review helpful:

    5 of 5 Stars  Awesome
    By George on March 22, 2009

    "It just works" says it all. I have been using Demon WP Insecticide for 10 years. Forget what you read about multiple applications per year. Maybe outside, but inside, unless you wash or vacuum it away, it lasts forever. I haven't used it in 2 years indoors and it's still killing. I thought, after two years, though, another application couldn't hurt. The first time you use it, when you wake up the next morning, you will be in awe of the dead insects in your house. Just do every base board, even in cabinets and closets and every threshold into your house, garage, carport, etc...threshold exteriors need to be repeated if exposed to the elements. This stuff is the last word in pest control. Don't waste your money on supermarket and building supply store junk and pest control companies that come out and use this same stuff, and bill you $250.

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  • 147 of 156 people found this review helpful:

    5 of 5 Stars  This stuff is awesome!
    By Kevin on August 28, 2007

    I have 2 large dogs in my house. Had fleas really bad. I tried every type of bug bomb- Home Depot, Lowes, and Walmart had and it seemed like they multiplied. My parents turned me on to this product Demon WP. I sprayed my baseboards, windows, doors, weep holes in the brick, the entire perimeter of the house, the soffit on the house, and the perimeter of my yard. After all that, I still had 2 pouches left, so I went ahead and sprayed my lawn. I have not seen another live bug in the house for 2 years. I may not have applied it the way I'm supposed to, but this stuff is awesome. Highly recommended.

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  • 110 of 115 people found this review helpful:

    5 of 5 Stars  Try it and you will be satisfied!
    By Chris on February 21, 2006

    I have used Demon WP and I know it works . If you have a roach problem in your home this will kill them and will keep killing for months . It goes on wet and dries to a powder . You will be seeing dead roaches in 24 hours and 1 application will last months of killing power . It is safe too, I have pets and a small child and have never smelled or had a problem like pest control services cause . Try it and you will be satisfied.

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  • 97 of 103 people found this review helpful:

    5 of 5 Stars  Try this product!
    By Joyce on July 6, 2008
    Verified Purchase

    Great product!!  I've been using this product for 2 years and living by the ocean, we have our fair share of palmetto bugs, roaches and every crawly bug known to man. Demon WP keeps the house insect-free and considering I have a bug phobia, this means a great deal knowing that there aren't any unwelcome pests crawling around our home. Anyone having a problem with bugs should try this product...you'll be glad you did!!

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Most Recent Customer Reviews
  • 5 of 5 Stars  Demon works
    By Lynnette on December 14, 2014

    This is my standby for getting rid of bugs and it has never failed me.

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  • 5 of 5 Stars  Great Stuff
    By Reta on December 1, 2014

    Roach free for almost three years now. Keep on hand to control spiders and other insects in the home. Just spray once every six months. Also great for keeping wasp, yellow jackets and other bees from making a nest around the outside.

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  • 5 of 5 Stars  good stuff
    By Cgrissom on November 17, 2014

    It seems to do the job. I have a pretty bad roach infestation in my kitchen and was starting to spread to other areas of the house. We completely cleaned out the kitchen cabinets and sprayed everything down. After the spray down I noticed the roaches moving about rather slow and peculiar. Next day I noticed several roach bodies laying around. Three weeks later along with the help of bait the infestation is definitely dwindling down! Great product!! Highly recommend this stuff plus the name of it is fitting lol!

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  • 1 of 1 people found this review helpful:

    5 of 5 Stars  Best perimeter treatment on the market.
    By Billy on November 4, 2014

    Been using Demon for years. Anything that crosses this stuff, wishes they stayed off my property!

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  • 1 of 1 people found this review helpful:

    5 of 5 Stars  successful
    By Jimmy on November 4, 2014

    The best I could hope for. Fewer roaches ever day. Thanks for advice & help Satisfied

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  • 5 of 5 Stars  Excellent Product
    By Flbutterfly4u on October 22, 2014

    I highly recommend this product as it does the job eliminating those pesty ugly roaches, ants, any other critters that love to hide in our yard or tight spaces. We are careful spraying around especially if you have pets. We are careful also at home. I am pregnant so my husband handles this product. It is strong and very potent. 5 stars for this product and will buy again.

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  • 5 of 5 Stars  Demon WP Insectide
    By Lurty on October 22, 2014

    I have sprayed Demon WP Insecticide around the exterior of my house about every 90 days for several years, with very good results against various kinds of insects making their way into the house. Originally I purchased the product locally and then found I could buy it from Do MY Own Pest Control at a considerable savings. I strongly recommend this product and Do My Own Pest Control.

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  • 5 of 5 Stars  demonic for bugs
    By Cyclon on October 20, 2014

    This product rocks. We've had a lotnof Palmettos carpenter ants and other gizmos crawling around and now they're all dead. Cyclon B would be jealous.

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  • 4 of 5 Stars  Great Service!
    By Tabby on October 16, 2014

    Not perfect, but they're worth it. Ordered 2 packages of Demon WP(bug control), billed for 2 but only received 1. Immediately called customer service, who was very friendly and understanding. Easily shipped the 2nd package and received it basically the next day. No one is perfect, therefore I won't complain. I will definitely continue to shop here!

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  • 5 of 5 Stars  Demon WP Insecticide
    By Martin on October 15, 2014

    Like many of you spent tons of money on bug spray and the problem never end. I invested in this product and I have to say that all positive reviews are correct if used properly. I sprayed cabinets all around my apartment and at the second week, problem solved. I am so impressed that, I bought more to have in stock for future applications. Negative reviews tells me that, some people are not using this product correctly. No more bug spray to buy. 100% recommend this product and also pets safe.

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Most Helpful Q&A's

September 6, 2009 Scott asked:

QIs Demon WP safe around children and pets?

ADemon WP is safe to use around children and pets when mixed and used correctly.  With most professional products such as Demon WP, once you mix it with water it is only strong enough to kill small insects.  You should always keep children and pets away from where you are treating.  Once the product has time to dry which usually only takes 30 minutes, it is safe for children and pets to re-enter the room.  Of course you should always keep any pesticide or cleaning product out of reach of children. 

220 of 223 people found this answer helpful.
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May 16, 2010 Tim asked:

QIs Demon WP children safe when sprayed inside the home?

ADemon WP is safe to use around children and pets when mixed and used correctly.  With most professional products such as Demon WP, once you mix it with water it is only strong enough to kill small insects.  You should always keep children and pets away from where you are treating.  Once the product has time to dry which usually only takes 30 minutes, it is safe for children and pets to re-enter the room.  Of course you should always keep any pesticide or cleaning product out of reach of children. 

76 of 79 people found this answer helpful.
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July 17, 2010 Diane asked:

QIf you don't use the Demon WP mixed with water, will it still be good to use later?

ADo not mix Demon WP until you are ready to use it and never mix more than you can use at one time. Demon WP should be used within 24 hours after being mixed with water.

63 of 66 people found this answer helpful.
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August 31, 2009 Daniel asked:

QDoes Demon WP kill fleas?

A

Demon WP does kill adult fleas, but it will not effect flea eggs or other stages.  It is always adviseable to mix an IGR (Insect Growth Regulator) with the product you are using. An IGR mixed with Demon WP will help slowdown the reproduction process and yield better results. Demon WP is also only labeled to treat fleas outside as it cannot be applied as a broadcast treatment indoors (where fleas will be present). For indoor flea treatment products, please click the link below.

 

Indoor Flea Treatment Products

61 of 65 people found this answer helpful.
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March 11, 2010 Jim asked:

QCan Demon WP be sprayed on the outside of a home and still be effective?

A

Demon WP is labeled for both indoor and outdoor use. Apply Demon WP to exterior door frames, window frames, places where utilities (cables pipes and wires) enter into the structure, eaves, soffits, around the bottom of the foundation and out onto the ground several feet. If you have an existing insect infestation, you may also need to spray indoors around the door frames, window frames, places where utilities (cables, pipes and wires) enter into the structure and around the baseboards. Demon WP will last for about 4 weeks outdoors and about 12 weeks indoors.

56 of 57 people found this answer helpful.
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Most Recent Customer Questions

October 21, 2014 Pattie from Austin, Tx asked:

QI sprayed Demon around base boards yesterday and this morning my 8 year old cat
has vomited about 3-4 times today including tonight at 9:00pm. He is hiding and does not want to sleep on the bed with me which is his practice. He may have walked on wet Demon. What is antidote if he has Demon over exposure?

A

We would recommend contacting your veterinarian as soon as possible. They would better be able to give you advice on your cat.

We do recommend keeping your animals out of any area that was sprayed until Demon WP and any other product is completely dry.

1 of 1 people found this answer helpful.
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October 17, 2014 Jackie from St Petersburg, Fl asked:

QI have indoor birds. Will Demon WP affect then in any way?

A We would not recommend spraying Demon WP while the birds are in the room. Demon WP is safe for animals once it has dried. This could take anywhere between 2-3 hours.

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October 16, 2014 Martin from California asked:

QWill Demon WP kill bed bugs?

A

No, Demon WP is not labeled for bed bugs.

We would recommend using Temprid SC. For your first treatment, you will use 16 mL per gallon of water and spray around the baseboards and cracks and crevices in the rooms where bed bug activity has been found. You will do follow up treatments every 10-14 days until there is no activity for 30 days. We would also recommend using Cimexa dust inside the wall voids. The bed bugs will walk over the dust and dry out. This can be applied with a hand duster. We would also recommend treating your mattress and box spring directly with Bedlam Insecticide. You will treat the tufts and seams of the mattress where bed bugs are likely to reside. Our Bed Bug Guide is a wonderful guide that we provide as well.

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October 14, 2014 Laura from Providence, Ri asked:

QCan I use Demon WP in a regular spray bottle (like an empty Windex bottle)?
We don't have access to a pressurized spraying system like in the instructions.

A No, Demon WP should be mixed with a gallon of water and applied with at least a one gallon pressurized pump sprayer per the product label instructions. We do carry a pump sprayer that you can purchase for the application.

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October 14, 2014 William from Los Alamitos, California asked:

QI want to kill brown widows.
Do I need one or two packs per gallon to kill brown widows? Thanks.

A We would recommend using two packs of the Demon WP Insecticide per gallon of water when treating for spiders.

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October 12, 2014 Michael from Tampa asked:

QDoes Demon WP Insecticide kill bed bugs?
Does Demon WP Insecticide kill bed bugs?

A Demon WP Insecticide is NOT labeled for bedbugs. Therefore, we would not recommend using it for that pest. We would recommend our Beg Bug Kits. Our bed bug kits feature top of the line products, the same products used by pest control professionals. Each kit comes with full instructions that explain exactly how and where to apply the products. Our kits have a very high success rate when customers follow the instructions, take their time, and treat thoroughly.

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October 9, 2014 Shawn from Perry Fl asked:

QWhy is the jar of demon always out of stock

A The 1 pound jar Demon WP Insecticide has been discontinued. You may want to consider Cyper Wp in its place.

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October 9, 2014 Randy from Cedar Creek Tx asked:

QI am applying Demon WP in the kitchen cabinets, how long after I spray can I put my dishes back in?

A Once Demon WP is dry, is it okay to put your belongings back into the cabinets. Depending on how thoroughly you sprayed the cabinets and how much residue is left behind - It is up to you if you want to wipe it out as well before replacing your belongings.

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October 8, 2014 Jaime from Alvin, Tx asked:

QDoes Demon WP kill black and brown widows? If so, how long does the residual last?

A Yes, Demon WP will eradicate all spiders and has a residual of 30 days on the outside and 90 days on the inside crack and crevices.

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September 30, 2014 Tammara from Arakdelphia, Arkansas asked:

QWill demon hurt chickens that eat the dead bugs or effect the egg safety?
Sprayed outside 3 days ago. Kept hens up until today, but they immediately went for the dead bugs when they were let out. Will they be ok? Is it safe to eat the eggs or is there a "detox" period where we should discard the eggs?

A The amount of insecticide on the surfaces is so minute that its only toxic to something the size of an insect. Even if the chickens were to eat many of the dead bugs, they would not be ingesting enough poison to harm them or the eggs. 

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