Search  for anything...
Syngenta

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

  • Based on 9,224 reviews
Condition: New
Checking for product changes
$19.89 Why this price?

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: In Stock.
Fulfilled by Amazon
Arrives Saturday, Jul 26
Order within 10 hours and 6 minutes
Available payment plans shown during checkout

Recently Viewed

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: Capsules


Item Weight: 1 Ounces


Liquid Volume: 1 Gallons


Active Ingredients: Cypermethrin


Brand: Syngenta


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 6 x 3 x 0.25 inches; 1 ounces


Item model number ‏ : ‎ 74819


Date First Available ‏ : ‎ November 21, 2009


Manufacturer ‏ : ‎ syngenta


Country of Origin ‏ : ‎ USA


Best Sellers Rank: #1,175 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #66 in Insect & Pest Repellent Sprays


#66 in Insect & Pest Repellent Sprays:


Customer Reviews: 4.6 4.6 out of 5 stars 9,224 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jul 26

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.

Similar Products

Top Amazon Reviews

    • Works Great .... Kills all the Bugs
Number of Items: 1
This stuff works great. Kind of lonely without house spiders though. The bugs seem to know to stay aways since I started using this insecticide. No odor that I can tell. No bugs around. Those big black stink bugs still show up but then roll over dead .... it seems It is a rural ranch house and after I used this for a year all of the bugs are gone. Sad to see that it also takes out walking sticks though .... it kills all the bugs.... I really don't want it to kill Praying Mantis . I only use it outside .... I dilute it after half is gone to extend the life of the batch. The packets are very flimsy and don't use make up a batch in the wind. Wear rubber gloves. It cheaper than the already mixed stuff you buy at the hardware store and seems to work better too ... show more
Reviewed in the United States on April 24, 2025 by Amazon Customer
    • Best product ever
Number of Items: 1
We spray it around our house , also my husband uses it for the boats offshore. You only need it sprayed every 6 months…. It’s amazing 20 dollars every year! Highly recommend!!! Fast to dry! Sprays well in anything.
Reviewed in the United States on May 18, 2025 by Katie
    • Roach killer
Number of Items: 1
This stuff is a must in Florida keeps the bugs and roaches away. If they cross anyplace that has been sprayed they are dead. Works at least 3 months
Reviewed in the United States on May 19, 2025 by Jamie
    • Quality
Number of Items: 1
Good product
Reviewed in the United States on May 20, 2025 by Andy bahatra
    • It works
Number of Items: 1
So far so good. I was having a little bit of a problem seeing spiders outside. However, after spraying the product, it seemed like it may have worked. However, where I live, it's been raining a lot. So not sure until after the rain dries up after this weekend of August, 21st. I will definitely see. So far so good. ... show more
Reviewed in the United States on August 18, 2024 by D. K.
    • Works great!
Number of Items: 1
This stuff is toxic, but it killed the scorpions I was after. Just read the directions and don’t get it on you. You’ll be fine. It’s easy to mix and apply.
Reviewed in the United States on April 25, 2025 by Kindle Customer
    • Great product. I highly recommend.
Number of Items: 1
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
    • Five stars
Number of Items: 1
This stuff is awesome. I sprayed all around inside and out. No bugs to be seen❤️❤️
Reviewed in the United States on April 29, 2025 by Amazon Customer

Can't find a product?

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