Search  for anything...

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

  • Based on 9,011 reviews
Condition: New
Checking for product changes
$19.09 Why this price?
Save $4.90 was $23.99

Buy Now, Pay Later


As low as $4 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: Only 9 left in stock, order soon!
Fulfilled by Amazon

Arrives Friday, Jan 24
Order within 14 hours and 10 minutes
Available payment plans shown during checkout

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: 0.04 Kilograms


Liquid Volume: 1 Gallons


Active Ingredients: Cypermethrin


Brand: Syngenta


Item Form: Powder


Item Weight: 0.04 Kilograms


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: 1.41 ounces


Manufacturer: syngenta


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, Jan 24

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • 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

  • Scorpion killer
I'm in Phoenix AZ. Double strength, this kills scorpions and anything else. Forget the pest guy. Use this when needed. A fraction of the cost. I only spray outside. Not sure you'd want this inside, it's powerful. If you kill em before they can get in, you don't need to spray inside!
Reviewed in the United States on December 11, 2024 by B Mile

  • 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

  • Amazing Insecticide for Invasive Bees!
For some strange reason, wasps, hornets, mud dobbers, and yellow jackets love my house. I got tired of paying large sums of money for those aerosol bee sprays. I wanted to make my own bee spray, so I did a bunch of research and I found this here pesticide. I like the water soluble bags and the instructions are wicked simple. Since I was using it to kill invasive bees, I used 1 soluble bag per 0.5 gallons of water. When I tested it out on a wasps nest, they dropped quicker than using the spray cans. After I got done with my bee spraying, I diluted the rest and sprayed around my foundation and other places that bugs shouldn't be. I can say, use this with care, as it is a broad-spectrum insecticide - meaning it kills pretty much everything it touches. It does have a slight odor, but I'm used to this type of stuff. But for more sensitive people, it might be a wise idea if using it inside, to open the windows and keep them open for a few hours. I will be buying more. Seems like Syngenta knows their way around insecticides. ... show more
Reviewed in the United States on August 11, 2024 by diesel85

  • 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

  • Works great
works great!
Reviewed in the United States on December 18, 2024 by Lee Chester

  • Insecticide
Works great on ticks and chairs
Reviewed in the United States on December 12, 2024 by Cindy Tims

  • Great for fleas
We had a flea infestation outside and this product truly helped kill the fleas and their eggs. We even used it around our outdoor dogs and cats
Reviewed in the United States on November 22, 2024 by Harris

Can't find a product?

Find it on Amazon first, then paste the link below.