Black Flag Wasp, Hornet and Yellow Jacket Killer Aerosol

Wasp, Hornet & Yellow Jacket Killer

Wasp, Hornet & Yellow Jacket Killer is designed to kill wasps, hornets and yellow jackets, and elminate the nests where they live and breed Jet spray reaches nests up to 29 ft above ground.


Best Use

For outdoor use to kill wasps, yellow jackets, mud daubers, and hornets.


Kills on contact. Reaches nests up to 29 ft above the ground with a powerful jet spray. Kills: Wasps, Hornets, Mud Daubers, Yellow Jackets.

User Tips

Spray at sunrise or dusk when insects are least active. Stand a safe distance from the nest. Do not stand directly underneath or above nest. Shake can well before each use. Always hold can upright while spraying. With wind at your back, aim nozzle at nest and spray until soaked. Wait 24 hours before removing the nest.


Wasp, Hornet & Yellow Jacket Killer is rated 3.25 out of 5 by 4.
Rated 5 out of 5 by from Ground nesting yellowjackets Uncovered a nest of fairly robust yellowjackets. Spray one can of Raid Wasp and Hornet killer and one can of Spectracide Wasp and Hornet killer with no (zero, zip, zilch) result. The queen came out and we killed her with a hammer (really)! Sprayed a can of Spectracide Carpenter Bee and Ground Nesting Yellowjacket killer foam into the nest two nights ago. Still swarming today. Sprayed one can of Black Flag Wasp Hornet and Yellowjacket killer and knock down was immediate. Those that didn't die outright just flopped around on the ground. I'm impressed and going for another can (or two).
Date published: 2015-09-23
Rated 1 out of 5 by from Flawed trigger design!!! Warning! I just had a significant amount of this product spray-back forcefully into my face from the dislodged trigger blocking the exit nozzle. The tear-off tab is connected to the trigger mechanism. And the action of removing it can and does loosen the trigger which then disrupts the stream by blocking the exit nozzle when the trigger is pressed. This is my best guess as to what caused the malfunction. Please correct this seriously-flawed design.
Date published: 2015-08-10
Rated 5 out of 5 by from It works Sprayed a single level nest, ~15 hornets in total. Spray came out a little weak at first, and wider stream than expected at 15 feet. Soaked the nest pretty fast. Came back the next day to remove, all but one wasp was dead. No stings so I say this stuff works.
Date published: 2014-09-16
Rated 2 out of 5 by from bad instruction on how to use it when click on the how to section, it goes to home pest control product, very bad design.
Date published: 2015-07-05
  • 2015-10-05T06:04CST
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  • clientName_BlackFlag

Product Label




Active Ingredients

Prallethrin . . . . . . . . . . . . . . . . . . . . 0.025%
Lambda Cyhalothrin . . . . . . . . . . . . 0.010%
Other Ingredients** . . . . . . . . . . . . 99.965%
**Contains petroleum distillates.