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

My husband is a huge fan of this Demon WP Insecticide. We are constantly ordering it here on Amazon because the cost is reasonable and you get a good value for your money. My husband mixes one envelope of the Demon into a bucket with a gallon of water. The mixability of the demon and water is awesome and there is no seperation noticed. He then pours it into a pump up sprayer and sprays the slab around our house to treat for bugs. He also sprays all the ant beds in the yard and it's very effective at killing the ants. Whatever is left in the sprayer after he's treated all areas in the yard he just leaves the Demon mixture in the sprayer for the next use. This product is extremely versatile and has proved to be a valuable resource for treating all bugs and insects around our home. After the treatment, we immediately see dead bugs, insects, and ants, and the removal of these pests lasts around three months. We highly recommend this Demon WP for your extermination of pests around your home.

To say this works well is an understatement. Simple yet effective I highly recommend!!!!

I’m familiar with the active ingredient (cypermethrin), and I know it’s a very strong insecticide, so I expected it to be effective — and it definitely is. After treating my garage, I kept finding dead insects, especially cockroaches. It works by paralyzing them, so once they come into contact with it, they can’t move anymore and die right there. What surprised me the most is how long it lasts. Even after about a year and a half without reapplying, it was still effective in an enclosed space — insects were still dying from the treated surfaces. I also had some diluted solution left in a sprayer, and I used it later around the entrance of my new apartment and in the hallway. It still continues to work — insects step on it and die, even though the mixture was prepared a long time ago. For outdoor use, of course, it would need reapplication more often because of rain and exposure, but in enclosed areas it lasts a very long time. Overall, I highly recommend it. I’ve tried other liquid treatments before (even for mosquitoes around patios and fences), and this type of formula has always been the most effective for me.

Amazing, I have using this for 3 years, and it does the job. You want see anything crawling for at least 6-9 months. No odor, safe for kids and pets. No stains and you can spray anytime. Anywhere.

Product works well

Bugs gone lol awesome!!!

Ok, I am ordering more Demon WP , always keep some around for spraying for bugs, was turned on to this stuff when we lived in Florida, very pleased with the results. We had Palmetto bugs in Florida , (some call ‘em roaches) some were so large & they happen to run across the airport runways , the fuel guys would ride out to fuel”em up thinking they were airplanes. But, in closing I’ve used this since 1996, it works. Live in NC now and still use it .

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.