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Black Flag Dry Formula Roach Aerosol Spray

Last updated: March 7, 2023

Black Flag Dry Formula Roach Aerosol Spray
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We looked at the top Roach Sprays and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Roach Spray you should buy.

Overall Take

Use this sprayer to kill large or small insects with equal efficiency. The extension tube is a big help in getting the substance into cracks or crevices, where it can deter roaches for months. The product is safe for indoor use with little residue.

In our analysis of 63 expert reviews, the Black Flag Dry Formula Roach Aerosol Spray placed 6th when we looked at the top 12 products in the category. For the full ranking, see below.

From The Manufacturer

Insects invading your corner of the world? Whatever insect you’re fighting, Black Flag products are dedicated to providing the tools you need to regain control. With formulas that act fast and never back down, Black Flag insect controls have been arming homeowners in the battle against invading bugs for more years than any other brand. Black Flag Dry Ant & Roach Killer controls roaches, ants (excluding pharaoh ants and fire ants), carpenter ants, spiders, crickets, firebrats and silverfish with quick-killing action. Use this non-staining, dry formula indoors to flush listed insects out of cracks and crevices and kill them on contact. Keeps controlling German cockroaches for up to 6 months. Spiders (including black widow and wolf spiders) must be sprayed directly to be killed. Leaves no odor behind. Use the extension tube to direct spray into cracks and crevices in walls; dark corners of rooms, cabinets and closets; along and behind baseboards; beneath and behind sinks, stoves, refrigerators and cabinets; around plumbing and other utility installations; around waste containers and wherever else these pests may find entrance. Use along and behind baseboards, appliances, sinks, pipes and plumbing. To treat fleas and brown dog ticks, spray infested areas such as pet beds and resting quarters. Remove old pet bedding and clean or replace with clean, fresh bedding. Pets should not be treated with this product – to control the source of flea infestations, treat your pet with a product registered for application to animals.

Expert Reviews


What experts liked

No nasty, oily leftovers or odor after use. Protects from ants, roaches, and other insects. Includes an extension tube to direct spray into cracks and small spaces.
My kitchen was free of ants after one application. I’ve gone weeks now without ants since using the Black Flag home insect control spray.
The spray efficiently kills all types of cockroaches, ants, spiders and any other insects within 24 hours of contact with sprayed areas
It is guaranteed to keep working for up to six months against German cockroaches, so two times every year will be more than enough to keep your house roach-free.

What experts didn't like

Product takes a fair amount of time to dry. Spray can quickly fill room with chemicals if not applied directly into a crack.
The spray does take approximately 10 – 15 minutes to dry off (depending on how heavily you’ve used it), so you need to be careful with the sprayed areas during this time.
This is called a “dry” spray because after it evaporates there is little to no residue left. However, when you apply it, the spray comes out wet just like any other one and it will take a solid fifteen minutes before it dries out.
View our Roach Spray buying guide for in-depth advice and recommendations.

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