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Syngenta

Syngenta Demon WP Insecticide 2 Envelopes Containing 4 Water-Soluble 9.5 Gram Packets Makes 4 Gallons Cypermethrin 40%

    • Based on 9,110 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Apr 4
Order within 14 hours and 18 minutes
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Features

  • Quick knockdown and long-lasting - 90+ day residual
  • Can be used inside and out
  • Size: 1 Envelope contains Four 9.5 gram water soluble packets
  • Yield and Mixing: One 9.5g packet mixed with 1 gallon of water covers a 2,000 to 2,500 sq.ft. home.
  • Target Pest: Ants, Aphidsc, Assassin Bugs, Boxelder Bugs, California Oakworm, Centipedes, Chiggers, Chinch Bugs, Cockroaches, Crickets, Earwigs, Elm Leaf Beetlec, Firebrats, Fleas, Flies, Millipedes, Mites, Mosquitoes, Pillbugs, Silverfish, Sowbugs, Termitese, Bees, Carpenter Ants, Carpenter Bees, Fire Ants, Acorpions, Sod Webworms, Spiders, Ticks, Wasps

Description

Syngenta Demon WP Insecticide 2 Envelopes Containing 4 Water-Soluble 9.5 Gram Packets Makes 4 Gallons Cypermethrin 40%

Item Form: Powder


Item Weight: 1.4 Ounces


Liquid Volume: 1 Gallons


Active Ingredients: Cypermethrin


Brand: Syngenta


Item Form: Powder


Item Weight: 1.4 Ounces


Liquid Volume: 1 Gallons


Active Ingredients: Cypermethrin


Brand: Syngenta


Target Species: Insects


UPC: 702941748194


Product Dimensions: 6 x 3 x 0.25 inches


Item Weight: 1.4 ounces


Manufacturer: syngenta


Country of Origin: USA


Item model number: 74819


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Apr 4

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View our full returns policy here.

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Top Amazon Reviews

    • Great product. I highly recommend.
This is one of the best and effective roach killer that I have ever used. It really works. I have cockroaches and they are hard to get rid off. I notice that they come into my apartment from the neighbor's apartment next door. So I purchased this and sprayed it on the hallyway walls, their door and in my apartment. About a week later, Idid not see any more roaches in my apartment. This last about 3 months when I have to respray, which I don't mind doing because I don't want to live with these critters. I love the product and will continue buying. I really highly reeommend. Also, this product is good for several use and it is a good price on Amazon. ... show more
Reviewed in the United States on March 9, 2025 by KL
    • Very effective and affordable
This is hands down the most effective insect killer, especially spiders! It repels bugs and it will kill anything crossing its path. Leaves a powder residue but it's primarily a crack and crevice so barely noticeable. I have dogs and has never bothered them after I used inside.
Reviewed in the United States on March 25, 2025 by Amy
    • Definitely recommend. This stuff is no joke. Order it!
I had huge water bugs coming in, almost the size of dates😳 so I wanted something really strong. I HATE the smell of Raid, so I shopped around. It said that this stuff killed scorpions so I was sold. I went outside to the back of my house to spray where they were coming from and they instantly scrambled up outta there. I sprayed the cracks around where the house meets the cement and continued toward the front down the driveway. When I turned around to go back in the back door, HUNDREDS of the weirdest bugs were scurrying out, dying. Ones I didn't even know were there and and never seen OR heard of. Scary blue ones--yes, BLUE, and ants the length of my top two pinky knuckles that had STRIPES down their backs came to the surface. It's like this stuff SUMMONS bugs to kill them. 😂 It's easy to use, but due to its nature you have to be fully protected. Masks, protective gloves, long sleeves/pants, etc. Each packet has pouches in it with grayish beige powder. You put an entire pouch per gallon of water to dissolve(depending on the bug or infestation they say you can use 2 for 1st application); it's similar to Tide pods but thinner so don't get them wet before use. Shake well and apply. You can use a sprayer, but I've also applied with a sponge (indoors) to avoid the mist. Follow directions though. As far as smell there's very little and it dissipates when dry. As far as residue, since the powder is colored you may see it drip brownish if it's against white. It did show a whitish residue against my darker floor when it dried but it's not a permanent discoloration. Very good quality stuff. ... show more
Reviewed in the United States on July 3, 2024 by Kay
    • Perfect pesticide for homeowners
Been using this for a couple years now and I highly recommend it for keeping ants, slugs, spiders and all sorts of insects away from your house. I apply it about twice a year and it works great.
Reviewed in the United States on March 26, 2025 by Trent Vincent
    • Very effective
Highly effective product. I had tried everything else before this. I utilized the Sevin powder, diatomaceous earth, and traps. Things like Zevo and Raid are great for killing what’s right in front of you but this was a very effective barrier. It was a little difficult to follow the instructions for what I needed initially only because the paper had so much information. Mixing and spray was a breeze. I will definitely use this as a maintenance product in the fall/spring. ... show more
Reviewed in the United States on June 26, 2024 by Vicki B
    • Surpassed my expectations!
We have been using Ortho home bug spray for several years now in order to keep a roach, scorpion & spider problem under control. We hadn't really seen many roaches inside our house, except an annoying few during the night in our kitchen. The real problem was out in our back yard & back part of the house where there are prominent cracks in the foundation (old house) & less traffic. In the yard we have flies as well that we could not get rid of easily on our garbage cans (I tried insect spray, but once it gets wet from rain or the sprinklers outside it stops working). Well, I had read about Demon WP online searching for a way to get rid of Black Widow spiders & many people reviewed this product to kill many different bugs right on contact including black widows. Thankfully Amazon has it here because it isn't available in my town. The first spraying I just did a few choice spots to see if it would really work ( I was skeptical). I used 2 packets in a one gallon sprayer. The next morning we found a couple dozen bugs inside the back part of our house & the outside area were where the masses were dead. Impressive. So, I mixed up just one packet in a gallon sprayer & went around the inside & outside again focusing on all the cracks, perimeter & missing nothing. The next morning we found more bugs than the first time. Now it has been a week since my initial spraying & we are still finding dead bugs, roaches, beetles, ants, spiders, moths & flies to name a few. Now I had the idea to spray our rental home that is semi vacant. There was a take over by black widow spiders in that house. It took one packet in a one gallon sprayer, full inside perimeter & just the area outside where the spiders were taking over, including the front porch perimeter. Next morning & every other morning after that we continue to find dozens of bugs dead before they made it into the front door, including the black widow spiders. That cleared up the bug problem. I had no idea this stuff would continue to work as well as it is. In the past we have tried sprays, powders & mixes that bugs became immune to or that quit working once it got wet from rain or the sprinklers. Demon WP does not stop killing bugs & when I say it kills bugs, I do mean it kills in masses if that's what you have crawling around your house like we did. I've re-ordered this larger pack, because the price to mix my own comes out less than buying a gallon of already mixed spray (that doesn't work as well). My plans now are to share this with my family who are having a serious bug problem & live in an old, cracked house with many places for bugs to hide. I would not recommend this to my family if it did not work. This stuff works better than any store bought product I have tried in many, many years & for the first time we do not have bugs in our patio, porch, or even the back parts of our house. We can sit outside & not be attacked by a crawly thing. Amazing feeling to know that one simple powder mix can & does eliminate a bug problem quickly as it does. Keep in mind that if you have a really bad problem with bugs, you will need to spray occasionally to keep the numbers down. I am going to continue spraying as well, too. One comment on the odor, this to me has no odor & does not burn my skin if I spill it on me. (be careful to wear gloves & keep away from your face though). Great product, excellent price & like the reviews state this stuff works. ... show more
Reviewed in the United States on August 29, 2012 by Cat Lady
    • Great product!
Got rid of all the bugs inside and out!
Reviewed in the United States on March 4, 2025 by Pammycakes
    • Bugs be gone!
Omg works on all bugs!!!
Reviewed in the United States on February 26, 2025 by Terri Baker Chaney

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