How to Kill Roaches for Good: The Only Roach Killers You’ll Ever Need

Cockroaches are built for survival. They can survive for a month without food. They can hold their breath underwater for up to 40 freakin’ minutes. You can even chop off their heads and they’ll still live for a week or two!

When a pest is this good at surviving, you need to bust out the big guns.  Yes, we’re talking about going nuclear on these buggers by using a foolproof combination of all the most effective roach killers.

The good news is that you don’t need a lot of weapons – after all, you don’t have time to dilly dally with mediocre roach killers while the roach infestation grows with each new day.

You’ve got better things to do.

So get ready to obliterate this roach infestation with just 5 lethal ways to kill roaches – here’s how to kill roaches for good!

Boric Acid


This stuff is cheap, easy to get your hands on and very effective natural roach killer. It works by poisoning roaches once ingested, destroying their stomach lining and causing them to die of starvation.

Both boric acid and borax work since they both have boron in it, which is what kills these buggers. Get whichever one you can find.

How to kill roaches with boric acid: Mix the boric acid with sugar, honey, jelly, peanut butter, bacon grease, or anything else appealing for roaches and leave it in roach-infested areas. Mix really, really well so the roaches can’t eat around it. And go for a high concentration of the poison (i.e. 3 parts borax to 1 part sugar).

Advion’s Cockroach Gel Bait


When it comes to killing roaches, this stuff is the business! Seriously, Advion’s Cockroach Gel Bait might be the best roach killer ever invented.

All you do is apply the gel around popular cockroach hangout spots. Roaches will then come to feast on this yummy gel, which contains the active ingredient Indoxacarb. The best part about this gel is that it doesn’t kill the infected roaches right away – they’re allowed to live long enough to return back to their cockroach nests and infect all their roach friends as well.

Wait, no, that’s not the best part. The best part is that just one dose of this insecticide can kill three generations of cockroaches!

Here’s how it works: Cockroach #1 eats the gel, poops and dies. Other roaches come and eat Cockroach #1’s poop and body and then get poisoned themselves, providing more poisonous poops and bodies for even more roaches to die from.

Each roach that comes in contact with this gel bait can contaminate up to 40 other roaches in this way, which gets rid of the roach problem fast. Get some!

How to kill roaches with Advion’s Gel Bait: Apply the gel as per instructions. Be prepared for some pretty gruesome scenes ’cause all the roaches you didn’t know were living in your house will crawl out to die. It’s disgusting but don’t sweep away the dead roaches – leave them out so other roaches can eat them and spread the poison.

Keep reapplying the gel when they’re all eaten until you see the roach carcass population declining and the gel you’ve left out completely untouched.

Diatomaceous Earth


Diatomaceous Earth (DE) is all an natural roach killer that will kill any bug with an exoskeleton but is safe enough for any mammal to eat, including pets and kids.

When this soft powder comes into contact with roaches, puncture their bodies, causing them to dehydrate to death.

How to kill roaches with diatomaceous earth: Sprinkle a thin, even layer of DE anywhere you’ve seen roaches hang out (the surface must first be dry). Use a dust dispenser to make sure you distribute it evenly – roaches can avoid stepping on it if the dusting is too heavy.

Also, use DE anywhere roaches can hide as well as to line any entryways into your house so that roaches have to crawl through it in order to get into your house.

Bengal Roach Spray


The above roach killers are fantastic – but they don’t work immediately. So what do you do if you see a live roach crawling around and you want it dead asap?

Get Bengal Roach Spray. 

This stuff has permethin and it works incredibly well. It won’t kill the roach on contact but it’s even better – all you do is spray it in short bursts where you saw the roach and then walk away. In about 15 minutes, that roach (and any other roaches in the vicinity) will be totally, completely dead.

Insect Growth Regulator (IGR)


Remember how good cockroaches are at surviving? If you unleash the full force of the above roach killers, there’s a good chance you will wipe out your roach infestation.

But there’s also the chance that there might be a few pesky survivors. Not to mention unhatched roach eggs that managed to escape the carnage. The last thing you want is for these survivors to breed and create another roach infestation.

This is why the best way to kill roaches for good is to make sure they can’t reproduce. You can do this by using an Insect Growth Regulator (IGR), which is effectively birth control for insects. It doesn’t kill roaches – use the above for that – but it prevents roaches from reproducing. The result? No more roaches being born.

How to kill roaches with IGRs: Get Gentrol Point Source and the squeeze the raised end of the plastic to release the Gentrol IGR onto a filter paper. The stuff will move up to 75 square feet, damaging adult roaches so they can’t reproduce.

Use this in combination with the above roach killers to completely wipe out a roach infestation once and for all.

Leave a Comment:

1 comment
Margaret (Peg) Combs says July 29, 2018

Roaches can get into a microwave, oven and a refrigerator. Will placing boric acid tablets in these items deter them? What do you suggest? I don’t have roaches yet, but they’re in the trash room of the building. I want to prevent them.

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