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Customer Reviews for
Demon WP Insecticide

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

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4.5 of 5 stars (647 customer reviews)

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Demon WP Insecticide
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Displaying 1 to 20 (of 647 reviews)
  • 212 of 227 people found this review helpful:

    5 of 5 Stars   Phenomenal Product
    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
    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!
    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!
    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!
    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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  • 81 of 84 people found this review helpful:

    4 of 5 Stars   Fastest knock-down
    March 4, 2008

    Demon WP does the best job killing roaches with the fastest knock-down I have ever seen . However, for spiders it doesn't fair so well in my opinion. Only complaint is it leaves a slight stain on wooden floors and baseboards . It keeps killing a long time so re-spraying is only like 4 or 5 times a year . That itself will save you a bundle of money on exterminators.

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  • 66 of 71 people found this review helpful:

    5 of 5 Stars   Forget the exterminator!
    July 11, 2007

    I had just put on Demon WP inside and outside my house to control earwigs and roaches, a day later I saw a few dead roaches in my garage and a few outside along with a Black Widow! I didn't even know I had those. I feel a bit safer knowing that my 2 year old, 3 month old, and small dog should be safe. Well, I don't know about my 2 year old. He's in everything ;) The local pest control service wanted 50 dollars a month to get rid of bugs or 150 for a one time application. For 15 dollars and 4 treatments that probably will work better anyway. Forget the exterminator :)

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  • 55 of 57 people found this review helpful:

    5 of 5 Stars   Long time users
    April 10, 2009

    We have been using Demon WP for about 30 years. We hit a slump with kids and business draining us and couldn't afford the luxury of Demon and used some less expensive products. Yuck! They would work a little bit, wear out soon with a residual of about 6 weeks. With our kids grown and gone now, we have decided to go back to Demon. The real residual effect is more like 6 months and the day after we spray we find roaches sleeping the eternal sleep all over the house. Upside down, if you know what I mean. It's a wonderful product and I recommend it to anyone who asks.

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  • 50 of 53 people found this review helpful:

    5 of 5 Stars   Demon WP
    July 27, 2010

    My mom owns a house out in the Texas HillCountry that has become somewhat of a weekend home and never had anyone truly live in it. When anyone had the time to go to the house it was expected to find at least 3 scorpions in the house. And during a weekend visit, we'd probably kill at least three more just inside the house. One even fell off the ceiling while we were having coffee and landing right in the center of the table. They thrive at this property, almost literally in every nook and crany both inside and out. I was referred to a different product on this site but reseached more and felt the Demon was better suited to our scorpion infestation. It worked! It took two batches to saturate the indicated areas on the outside of the house and I did not even spray the inside. Over the course of a week I found only two scorpions inside and one was already dead and the other dying. TRIUMPH! It's been another week since I've been at the house so I am curious to see how it is doing over the course of some passed time. I will update after a couple of months as the treatment says it should not be necessary but about once every 3 months. The only downfall is that with any poison you do end up killing other bugs you may not want to. There literally was bug carnage along the perimeter I created on the patio...everything from locusts, cave crickets, spiders but I was sad to have killed two rather impressively large stick bugs.

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  • 49 of 49 people found this review helpful:

    5 of 5 Stars   Bye Bye Roaches
    August 27, 2010

    Best product I have used to date. One application ended the Roach infestation we have suffered for years. Originally I balked at the price, however the end results well justified the cost. Unit was ordered and received in about 6 days. Superior rating in my book.

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  • 43 of 46 people found this review helpful:

    5 of 5 Stars   Demon WP
    August 30, 2010

    One month after we moved into our home we started to realize we had a serious problem with spiders, particularly Brown Recluses. Most other spiders died relatively quickly using average over the counter pest control measures, but the Brown Recluse was particularly resilient. After some scary moments and worthwhile research I decided to give Demon WP a try. I prepared the mix and applied the spray directly to a spider and was expecting to see it die within 1-2 seconds and although it didn't immediately kill it, it was dead within 20 minutes. I applied this product in the house, the crawlspace, the exterior of the home and I couln't be happier! I have found many dead Brown Recluses. I used sticky traps to monitor movement and they have stayed clean. This product is fantastic and is definitely effective at ridding your home of Brown Recluses and protecting your family!

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  • 42 of 45 people found this review helpful:

    5 of 5 Stars   Very pleased!
    November 10, 2008

    Demon WP Insecticide powder works wonders for controlling bugs outside, and you don't have to spray chemicals inside your house. Very pleased, been using it for 4 years!

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  • 42 of 43 people found this review helpful:

    5 of 5 Stars   Easy to use! Highly recommend
    July 13, 2007

    I sprayed this Demon insecticide in closets, under cabinets, appliances and outside of the house. I see a lot of dead bugs now and no live ones. It even killed a few spiders and other bugs outside the house. It is easy to use with a pump sprayer . I would highly recommend it to everyone . Thanks and I will buy again .

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  • 38 of 44 people found this review helpful:

    5 of 5 Stars   Tremendous relief!
    June 24, 2007

    Awesome product. I've used it for over 10 years in my office and now in my home on 5 acres. It, along with a once over my immediate yard with insect granules in the spring, limits the outside cockroach problem to only a few stragglers a year due to open doors and/or windows. I spray the base boards and the perimeter of the house each year and we're covered. In this part of Texas where its hot and humid, Demon WP is a tremendous relief. Thanks!

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  • 35 of 39 people found this review helpful:

    5 of 5 Stars   Greak knockdown and residual power
    June 25, 2010

    This product has been an industry standard for many years. Roaches don't have a chance against this product when properly applied. It works great on spiders as well as most household pests. Because it is a wettable powder (WP) it will stay on surfaces much longer than a liquid product. Another great feature of this product is safety. A human would need to consume several liters of this mixed product to be fatal. When applying this product to the exterior of a home be sure to cover the area around windows, the eaves (for spiders) and the base of the home. This will kill the majority of pest before they enter the home and the residual power of this product will hold up over a month outside. In some applications the residual power can even hold up for a year. A 1lb jar could easily treat a standard home for 3-10 years. Much cheaper per year than almost any hardware store product. NOTE: If you apply this product to dark surfaces you will get white powder that is very visible and can be hard to remove.

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  • 33 of 36 people found this review helpful:

    5 of 5 Stars   Kills fast
    August 31, 2005

    I used Demon WP last year to control asian beetles (lady bugs.) It kills them on contact, and kills them for the remainder of the fall season. By spraying it outside the first day I saw the beetles come to the house, I was able to keep most all of them from entering and wintering in the house. This year I am going to order a pound tub and spray the out buildings as well as the house.

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  • 33 of 34 people found this review helpful:

    5 of 5 Stars   Completely satisfied!
    June 20, 2007

    I am completely satisfied with this product. I've had ant problems for two years and after applying Demon WP the ants are all gone. I have not seen one ant or roach in months. First, I had to hire a professional who could not get rid of the problem so I decided to take matters into my own hands and glad I did. I saved a ton of money.

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  • 28 of 30 people found this review helpful:

    5 of 5 Stars   Very effective
    September 6, 2006

    We have used Demon WP Insecticide before in another state. It was very effective in killing spiders, water bugs, roaches, etc.

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  • 27 of 29 people found this review helpful:

    5 of 5 Stars   Great for indoors and out
    May 6, 2008

    I have been using Demon WP since 2001 and it's the best I have found for inside and outside applications. I don't even consider anything else.

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  • 26 of 30 people found this review helpful:

    5 of 5 Stars   Best product
    June 21, 2006

    I received this product as a gift from my sister and have been using it for several months. There is no doubt that Demon WP is by far the best product I have ever used for killing any/all inside/outside/ household pests.

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