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🚫🐜 Stop pests at the source — foam your drains, own your space!
TERRO Drain Insect Killer uses a unique dry foam with three Insect Growth Regulators to deliver 360-degree coverage inside drains, breaking the life cycle of drain flies, fruit flies, house flies, and roaches. Its precision extension tube ensures targeted application on all pipe types, while being safe for septic systems. Regular use prevents infestations and keeps your drains pest-free.





| ASIN | B0F2VX1PRC |
| Active Ingredients | (S)-Hydroprene (0.36%); Novaluron (0.02%); Pyriproxyfen (0.02%); Other ingredients (99.60%) |
| Best Sellers Rank | #3,042 in Health ( See Top 100 in Health ) #17 in Indoor Insect & Pest Control Sprays |
| Brand | Terro |
| Brand Name | Terro |
| Customer Reviews | 4.2 out of 5 stars 1,052 Reviews |
| Included Components | Spray arm |
| Item Form | Dry Foam |
| Item Weight | 318 g |
| Item form | Dry Foam |
| Item weight | 318 g |
| Manufacturer | Terro |
| Model Number | T590 |
| Part Number | T590 |
| Specification Met | EPA |
| Specification met | EPA |
| Target Species | Insects |
| Target species | Insects |
| UPC | 070923363483 |
P**G
easy to use
easy to use
R**Y
Ok
Great
A**R
Weak foam
Foaming is weak
T**M
Not enough foam in bottle
Gave me 2 applications before it stopped spraying even though there is plenty of product still in the bottle. Not worth the price. Drain flies still present also.
M**A
Excellent product
Excellent
M**.
Gets in tight spots and foams nicely.
I can't say if this single product cleared out my drain flies but I did notice when the foam expands it brought all kinds of gunk up from the inside of the drain. Even after I thought I cleaned it pretty good. Gunk included a couple dead drain flies. Not sure if they were already dead or killed in the form but who cares - they're dead! I found it easy to direct the spray into the drain and it didn't take too much to fill the drain. I've still got plenty left after several treatments. My mom has COPD and I've got allergies that can be triggered by odor/perfume and this product did not cause any issues. There is almost no scent. I used this after letting Zevo flying traps (UV lights) run for about a week. Also treated the drains with Green Gobbler overnight. I still get the odd drain fly but I live in an apartment so it's possible some are coming over from other units.
I**X
Works but may need a few applications
This stuff works and I am pleased with the out come but it did take three applications. I live in an old house, about 100 years old and the gnat's seem to appear every summer. I also live by a lake so I don't know if that has anything to do with it. I would say it was an infestation, I couldn't eat without them buzzing around me. I am one of those people that is a bug lands in my food, it's now the dogs food so these things were maddening. (And yes, I know it's irrational to stop eating your food just because a tiny bug lands on it but gross's me out and that's the way it is.) Forget about drinking red wine because they love it and land in it immediately. In any event, the gnats literally drive me crazy. I hate them! I have tried everything to get rid of them. The vinegar, soap, water traps. The lights with the sticky cards. Anything I could find. These traps catch the gnats but they don't get rid of the problem. I saw this and thought I would give it a try. I ordered two cans to start with because I have three full bathrooms, a utility sink, plus the kitchen sink. The first time, I performed the application at night on July 7th and then went to bed. I used both full cans, which was mainly because I was figuring out how to use it properly and I put almost a full can in the garbage disposal. I would say in the next couple of days you could see a significant reduction in the number of gnats and I found several in my bathrooms dead. I figured it would take a couple of applications due to the other reviews that I read. Within about four days, I saw them beginning to increase again. I ordered two more cans and applied about 1.5 of them the night of July 12th. That is 5 days following the first application. Following that application, there was another significant reduction in the gnats and I was still finding dead gnats on my bathroom floors. After the first two applications there was a significant improvement in the quality of my life. Just chipping away at killing these gnats and I was/am determined to rid my house of these pests! Ordered two more cans. I was leaving for the weekend so I thought a perfect time for another application and then it would be able to sit for a couple of days. Applied another ~1.5 cans on Friday afternoon around 3:00pm on July 18th. Returned Sunday July 20th early evening. To my shear delight, I did not see any gnats! Monday, I saw one gnat. Tuesday, I saw one gnat. Wednesday I did not see any gnats. It is now Thursday morning and I have not seen any gnats. I am hoping that is the last of them but I still have enough product for another application if it is needed. So, in summary, it has taken me close to four cans to fully eliminate them over the course of 16 days. I ordered a total of 6 cans at a price tag of $95.82+tax so over $100 in total, so not cheap. Also, pretty sure the stuff is toxic because it says something about hazmat on the label for shipping. Hope this helps.
Y**S
Good in combo with other products to rid of drain fly infestation
Nice foam and good to use to fill drain to help rid drain of drain flies but if you have a real serious infestation you will need this plus Green Gobbler for drain flies and Gentrol Complete EC3. This product weekly and the other 2 daily until 2 weeks after drain flies are gone. Zevo lights help too.
A**E
Good product easy to use
Easy to use and seems efficient will buy again
D**E
It works for many weeks.
I have nasty tiny little critters leaping out of just one drain in one bathroom. I have tried many bug killers but this one works great. There is no scent. It kills all the bugs for weeks. I just ordered 2 more. It doesn’t take care of them forever so I ordered an extra one so I’m ready. Cannot find it in stores
Trustpilot
1 month ago
2 weeks ago