Syngenta Demon WP Insecticide 2 Envelopes Containing 4 Water-Soluble 9.5 Gram Packets Makes 4 Gallons Cypermethrin 40%
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Availability:
In Stock.
Arrives
Friday, Apr 24
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
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 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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
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.
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Reviewed in the United States on August 29, 2012 by Cat Lady
Ran into a friend who worked for an expensive pest control business in Florida!!!π Asked him to come spray my house. He told me to NEVER pay a pest control place EVER again!! TO USE??? π€¨ THIS stuff instead!!! ππ Exact SAME THING HIS company used!!π³ And I AM here TO TELL YA!!! ππΌβοΈ I have NEVER looked back!!!! π And THAT was 30 YEARS ago!!!!πβ€οΈπ House π built right next TO mine. And when I tell you that the AMOUNTS OF BUGSππ·οΈππ¦ THAT turns UP???π³ YOU WOULD move BACK UP NORTH!!!!β οΈππ NOOO joke!! BUT with Demon πΏ WP???π€ I NEVER HAD ONE BUG, IN MY house, ALIVE!!!!π Might have made it IN my house but never lasted more than a few minutes, ALWAYS just twitching AND dying!!!πβ οΈππ I even got German COCKROACHES IN MY houseπ€¬, from a pediatric patients backpack π and the DEMON πΏ EVEN KILLED THOSE puppies!!!!π (Notoriously IMPOSSIBLE TO GET rid of, btw!!) Florida bugs ARE a totally DIFFERENT breed!!ππ I CANNOT RECOMMEND DEMON WP TO you HIGH ENOUGH!!! πβ€οΈππ IT IS THEE ONLY THING I'VE EVER USED SINCE!!!ππΌβοΈ While it does leave a milky residue once dried, I'd MUCH RATHER THAT OVER ANY "live" BUG π IN my house!!!!πβ€οΈπ And it's beyond affordable and waaaay BETTER than ANYTHING ELSE ON the market!!!!πβ€οΈπ I've owned several houses and it's BEEN 100% EFFECTIVE, EVERY SINGLE TIME!!!β οΈβ€οΈπππ EASY TO use as well!!!π JUST a simple gallon sprayer, drop the saran wrap tube (WHY it's called "WP" MEANING wettable powder!! Do NOT π« TOUCH WITH WET hands!!!πππ¬π€¦πΌβοΈ I'm an idiot ππΌβοΈ and DON'T READ instructions until AFTER I screw things UP!!πππ) USE JUST ONE tube for maintenance and use TWO tubes per gallon for INFESTATIONS!!!π JUST SHAKE TO dissolve and start spraying!!!!πβ€οΈ Generally cost is around $24 FOR a 4 TUBE PACK!!! SAYS TO "Spray/use either monthly or every 3 months" (can't rememberπ sorry) But I NEVER HAVE!!π JUST once or twice a YEAR!!!ππ€―π (I think they just tell YOU that so you use AND BUY MORE!!π°π°πΈπ) But EVEN IN FLORIDA??!?π€¨ I've NEVER needed TO spray THAT often!!!β€οΈπ You WON'T be sorry if you get this stuff!!!π Just CAN'T use on food prep surfaces and around fish tanks and KEEP pets AND kids AWAY FROM the areas UNTIL the spray HAS COMPLETELY DRIED!!!!πβ€οΈ Highly, HIGHLY RECOMMEND!!!!ππΌβοΈπβ€οΈπβ€οΈπ (AND NO, I DON'T have ANY affiliation, investment or connection TO the product, seller OR the manufacturer!!!π I'm JUST a normal, regular consumer just like the rest OF you!!!ππΌβοΈβ€οΈπ Just trying TO help YOU get RID OF bugs too!!π) Also CAN use INDOORS AND OUTDOORS!!πβ€οΈπ(IF you made it THIS far!!!π)
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Reviewed in the United States on May 24, 2025 by Christina L.
Over the years Iβve tried everything there is to get rid of fire ants in my yard living in the country. This product works extremely well, you spray some on the ant mound and they disappear over a few days, works great. Also works good for scorpions, fire ants, cockroaches, and other bugs. Just mix or instructions.
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Reviewed in the United States on January 11, 2026 by Vern Smith Jr.
I swear by this stuff and use it all the time. I mix it in my trailer sprayer and spray it around the house and trees. I also mix a light bunch and use it inside as well. This stuff works and the value to cost is good.
Reviewed in the United States on January 6, 2026 by Sean J.
This stuff works pretty good. It's the best stuff on the market that I've used for roaches. It's better than Ortho Home Defense Spray. I never had roaches in my apartment in the 7 years I've lived at my place. But a dirty neighbor moved in and there went the neighborhood. The 4th floor now has roaches! I'm so upset. This stuff kills them pretty good. It doesn't smell at all. I have to use it every 3 weeks to not see any though. Which means I have to use it a lot of it. That's why I gave it the 4 stars instead of 5. I recommend because other than hiring a professional this stuff is what you'll want to use. It's not safe around pets or children I wouldn't suppose. They want you to take precautions when applying it. I just spray places l know my cat will not go like around counter top edges around the sink behind appliances and so on.
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Reviewed in the United States on August 20, 2025 by Rabialala
I was tired of paying an exterminator so this was recommended. Itβs effective and works fast for getting rid of all insects, scorpions, bugsβ¦ whatever. I live in the country and we have it. Easy to use in my hand sprayer.
Reviewed in the United States on December 10, 2025 by Casey
This stuff kills fleas and other bugs quick. Easy to use, cheap. You must handle with care
Reviewed in the United States on December 1, 2025 by Audrey Emmanual
Wow German roaches watch out.
Reviewed in the United States on February 4, 2026 by John