Tandem Insecticide

4.5 out of 5 stars 7 Reviews | 15 Q&A

Tandem Insecticide

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Average Rating

4.5 out of 5 stars Rating: 4.3

7 Reviews | 15 Q&A

Product Overview

Tandem Insecticide is a powerful combination of thiamethoxam and lambda-cyhalothrin. Tandem Insecticide uses the combination of the two active ingredients to provide fast knock down and residual control of more than 90 pests. Use Tandem both indoors and outdoors from "cupboard to curb" in commercial, residential, and food-handling areas. Unique to Syngenta is iCAP microencapsulation technology providing the active ingredients protection against environmental conditions by using different sized capsules.

Tandem also provides systemic control of pests in plants using the active thiamethoxam. This active moves quickly into leaves where honeydew producing pests like aphids, scales, and whiteflies feed killing those pests and in turn limiting the supply of food for other pests such as ants.

Features and Specs

Active Ingredient: Thiamethoxam 11.6% lambda-Cyhalothrin 3.5%
Target pests: Over 90 Insects: Ants, Beetles, Caterpillars, Cockroaches, Fleas and Ticks, Mites, Mosquitoes, Wasps, Wood-destroying insects and more
* Also controls Grubs, Chinch bugs, Fire Ants, Cutworms and other ornamental insects
* See label for complete list
For use in: Commercial & Residential Indoors & Outdoors: Apartments, Office Buildings, Food-handling areas, Landscaping, Parks, Recreational areas and Athletic Fields, including Lawns, Ornamental Trees and Shrubs
* See label for complete list
Application: Indoor Use: Spot, Crack-&-Crevice, Void Treatment

Outdoors: Perimeter Spray, Spot, Crack-&-Crevice or Void Treatment
* See label for complete application instructions
Pet safe: Yes, if used as directed on Label
Formulation: Professional Product
Group 3A & 4A Insecticides
NOT FOR SALE TO: HI, NY (New York - Only Indoor Use)
Shipping Weight: 2.55 lbs
Manufacturer: Syngenta (Mfg. Number: 47162)
EPA Registration: 100-1437


In the State of New York, this product may only be applied for indoor uses.

Tandem contains a Group 3A insecticide (lambda-cyhalothrin, belonging to the pyrethroid class of chemistry) and a Group 4A insecticide (thiamethoxam, belonging to the neonicotinoid class of chemistry). Insect biotypes with acquired or inherent resistance to Group 3A or Group 4A insecticides may eventually dominate the insect population if Group 3A or Group 4A insecticides are used repeatedly as the predominant method of control for targeted species. This may result in partial or total loss of control of those species by Tandem or other Group 3A or Group 4A insecticides.

5 stars   5
4 stars   1
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1 star   1
  • 5 of 5 Stars

    not for uneducated use

    By Brandon on 09/13/2013

    The poor reviews on this product are based on lack of knowledge and understanding of the chemical and molecular properties of tandem. Tandem is demand CS with an added insecticide. THERE IS NO "CURE-ALL" SPRAY! Spray means nothing. Application and procedure is what matters most. The "smell" is very, very minimal. Like a weak paint thinner. The smell is the detergent in the chemical known as an emulsifier. That allows the oils of the product to bind with water. Before applying ANY chemical to ANYTHING regarding bed bugs, you MUST at LEAST consult information provided by universities such as Perdue, Kentucky, and the like . You MUST also be patient, for the insect has 5 cycles in life. Tandem is an excellent product. Top grade. Pest control has become indescribably better thanks to syngenta, Zoecon, and Bayer. I'd throw BASF in there, but they didn't produce termidor. They bought it from bayer

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    31 of 33 people found this review helpful

  • 5 of 5 Stars


    By Tom on 06/09/2013

    Used it for Ants, Aphids, various Grubs, Spiders, Wasps, Roaches, Bed Bugs as part of an integrated approach. Excellent results.

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    9 of 11 people found this review helpful

  • 4 of 5 Stars


    By Scott on 09/29/2013

    I just started to use this product. So far I like it. My customers don't smell it, easy to use and I get few call backs..

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    8 of 8 people found this review helpful

  • 5 of 5 Stars

    Jeremy Anderson

    By Jeremy on 09/03/2013

    I do pestcontrole every day and so far its been great.

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    6 of 10 people found this review helpful

  • 5 of 5 Stars

    its pretty good

    By Roland on 08/09/2017

    So far it's been good. Little pricey but I called around for a pest control service and they wanted 80.00 per application. I haven't put a dint in my stuff and have applied 2 applications so far. Dead spiders everywhere since I've applied this stuff and haven't seen one bug of any type inside. I would say it's worth the extra money because all the major pest control companies use this.

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    4 of 5 people found this review helpful

See all 7 customer reviews

Questions & Answers

Have a question about this product?
How long does Tandem last outdoors?

How long does it last outdoors? Does the stronger rate make it last longer?

Tandem will hold like most other insecticides outdoors which is anywhere from 30-90 days depending on the elements in the area and how they effect it. The stronger rate on the label will provide a quicker knockdown for heavier infestations and can help provide a stronger product for longer on the surface. 

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6 of 6 people found this answer helpful

I have a Taexx system. How do I use it without hiring a pest company?

We do sell products like Optigard Flex and Tandem that can be used in the system, but nothing to technically service it. You would want to try and locate the manufacturer of the system or a local company that has the equipment to service the system for you.

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4 of 11 people found this answer helpful

How much will one quart of Tandem make?
The amount of Tandem Insecticide a quart size bottle will make depends on the concentration it is used at. If you use the 0.065% concentration, a quart size bottle will make about 58 gallons of solutions.

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4 of 4 people found this answer helpful

How does Tandem do on treating Mosquitos? How does it compare to Talstar p?
Tandem is a brand new product but it is showing promise as a mosquito control product. Because it is so new we don't have any comparison information for you at this point. Talstar P is still the most commonly used product for mosquito control. Most pros choose to mix it with Nyguard IGR to sterilize the adults so they cannot lay eggs before they die after coming into contact with treated areas.

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3 of 3 people found this answer helpful

Is Tandem Insecticide or Onslaught FastCap better for spider control?

I will continue purchasing from you, as I will only use the pest control service once yearly. My concern is spiders. Should I purchase Tandem or Onslaught Fastcap from you going forward? Thanks.


Either Tandem or Onslaught FastCap would be great for spiders as they are both micro-encapsulated and, therefore, easy for these hard-to-kill pests to pick up on their legs and bodies. Onslaught Fastcap would be the faster kill overall due to the added synergist.

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1 of 1 people found this answer helpful

See all 15 customer questions

Tandem Insecticide 4.5 out of 5 stars Rating: 4.3 (7 Reviews / 15 Q&A)

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