The 8 Best Chemicals to Kill Roaches

Advion Cockroach Gel Bait is the product most pest control operators reach for when a home has an active German cockroach population. It is a soft gel delivered in 30 gram syringes, and the active ingredient is indoxacarb, a compound that acts slowly by design so that a feeding roach has time to return to the harborage.

The strength of the format is placement. A pea size dot inside a cabinet hinge, along a countertop seam, behind a refrigerator or inside a motor housing puts the bait exactly where roaches travel and keeps it away from people and pets. Four tubes is a generous amount for a single household, which means you can reapply in fresh spots as feeding patterns shift instead of rationing one small syringe.

The limits are the ones every bait shares. Gel placed on an open counter dries and loses appeal, spraying a repellent insecticide near a placement can drive roaches away from it, and a kitchen full of crumbs and grease gives roaches a competing food source. Listings also vary in how many plungers and tips are included, so check the pack contents before ordering.

Bottom line: if you are buying one product for an indoor roach problem, this is the one to start with, and it is the reason the pack sits at the top of this list.

• Active ingredient: indoxacarb
• Format: gel bait in syringe tubes
• Pack: 4 tubes, 30 grams each
• Target pests: German, American and other major cockroach species per the label
• Use sites: indoor and outdoor crack and crevice placement
• Application: small bait dots, reapply as the bait is consumed
• Compatible with standard bait guns

Place many small dots rather than a few large ones. Target cabinet hinges and corners, the seam under a countertop, the void behind and beneath appliances, plumbing penetrations and any warm motor housing. Aim for placements in the rooms with confirmed activity first, then extend outward.

Keep sprays away from bait placements so the two treatments do not work against each other. Check placements after a few days and refresh the dots that have been eaten. If feeding stops while activity continues, move the placements and consider rotating to a bait with a different active ingredient.

Read the full label before the first application and follow the manufacturer directions exactly. Place the gel only in cracks, crevices and voids where children and pets cannot reach it, never as a visible bead on an open floor or counter.

Cap tubes between uses and store them in the original packaging, upright, away from food, heat and freezing temperatures. Wash your hands after handling, wipe up any accidental smear on an exposed surface, and keep the product locked away from children.

Vendetta is a professional gel bait from MGK that uses abamectin B1 instead of indoxacarb. On the shelf it looks like any other syringe of gel, and in use it behaves much the same way: small dots placed in cracks, hinges and voids, consumed by roaches that then return to the harborage.

The reason to own it is rotation. German cockroach populations can develop aversion to a bait matrix when one product is used repeatedly in the same space, and the professional answer is to switch to a bait with a different flavor base and a different active ingredient. Vendetta is the standard rotation partner for an indoxacarb gel, which is exactly why it appears on this list next to Advion.

The drawbacks are practical rather than technical. It is less familiar than a retail brand, listings vary on whether a plunger is included, and like every bait it depends on the user placing it where roaches actually travel. It rewards the same discipline as any professional product.

Bottom line: buy it as the second bait in your rotation rather than the first, and it earns its place in a long running roach problem.

• Active ingredient: abamectin B1
• Format: gel bait in syringe tubes
• Pack: 4 tubes, 30 grams each
• Target pests: cockroaches, including German cockroaches per the label
• Use sites: indoor crack and crevice placement per the label
• Compatible with standard bait guns

This bait suits the household that has already run one gel bait and noticed feeding slow down while roaches remain active. It is also a sensible pick for apartment buildings and rentals where the same product has been applied repeatedly over the years.

If this is your first roach product and you want the simplest path, start with an indoxacarb gel and keep this one in reserve. If you are managing a stubborn population across several rooms, owning both from the start saves a trip.

Follow the label directions for placement sites and quantities, and treat the product as the pesticide it is. Keep the gel inside cracks, crevices and voids that children and pets cannot access, and never apply it to surfaces where food is prepared.

Store the tubes capped and upright in their original packaging, away from food, heat and freezing temperatures, and out of reach of children. Wash your hands after handling, and clean up any gel that ends up on an exposed surface.

Combat bait stations are the low effort entry point to roach baiting. Each station arrives sealed and ready to place, so there is no syringe technique to learn, no sprayer to fill and nothing exposed on a surface. For a renter, a first time user or a home with a curious toddler, that simplicity is the whole appeal.

This particular pack is formulated for large roach species rather than small German cockroaches, which matters when you are choosing between the two Combat lines on a shelf. Placement is still the deciding factor. Stations belong under sinks, behind and beneath appliances, inside cabinet bases and along the routes roaches use, not in the middle of an open floor.

The tradeoff against gel is precision. A station cannot follow a roach into a cabinet hinge or a narrow appliance seam, so a heavy infestation usually needs gel as well. Stations also need replacing on the schedule printed on the pack rather than being left in place indefinitely.

Bottom line: the easiest way to get real bait into a home, and a sound choice when a sealed format matters more than pinpoint placement.

• Format: sealed plastic bait stations
• Pack: 8 stations
• Target pests: large roaches per the label
• Use sites: indoor placement under sinks, behind appliances and in cabinet bases
• Application: place and leave, replace per the label schedule
• No mixing or spraying required
• Active ingredient and concentration are printed on the package

Choose stations if you want a bait you can place in five minutes and forget about, or if an open gel deposit is not something you are comfortable having in the house. They suit rentals, small apartments and homes where a sealed format is the priority.

If you are fighting a widespread infestation, or the roaches you are seeing are small German cockroaches, pair these with a gel bait or start with the gel instead.

Place stations where children and pets cannot reach or chew them, which in practice means under and behind fixtures rather than in the open. Read the label before placement and follow the manufacturer directions for the number of stations per room and the replacement interval.

Do not open, cut or modify a station. Wash your hands after handling, keep spare stations in their sealed packaging and store the pack away from food and out of reach of children.

Compare-N-Save Indoor and Outdoor Insect Control is a bifenthrin concentrate, the format professionals buy because you pay for chemistry rather than for water and a plastic jug. A 32 ounce bottle mixed at label rates produces far more finished spray than any ready to use container of similar size, which is why it is the value pick on this list.

Its job on a roach program is the perimeter. Bifenthrin leaves a residual deposit on treated surfaces, so a band around the foundation, along door thresholds, around utility penetrations and at the gaps where pipes enter the wall slows the flow of roaches coming in from outside. That complements a bait working indoors instead of competing with it.

The cost of the savings is effort and care. You need a sprayer, an accurate measure, and a careful read of the label, which spells out which indoor sites are permitted and which are not. Bifenthrin is also highly toxic to fish and other aquatic life, so keep it away from ponds, drains and storm water.

Bottom line: the most economical way to buy a residual insecticide for perimeter work, provided you are willing to mix it properly.

• Active ingredient: bifenthrin
• Format: liquid concentrate for dilution with water
• Size: 32 ounces
• Target pests: roaches, ants, spiders and other listed crawling insects
• Use sites: indoor and outdoor applications permitted by the label
• Equipment: standard pump or hose end sprayer, supplied by the user
• Mixing rate: follow the label for the pest and site being treated

Measure the concentrate exactly as the label directs for the pest and site, mix it in the sprayer with water and agitate before spraying. Treat a band along the foundation, around doors and windows, at utility and pipe penetrations, and on the surfaces the label lists. Spray until the surface is wet but not running.

Keep the treatment on the perimeter and structural entry points and keep it away from indoor bait placements so the spray does not repel roaches from the bait. Let treated surfaces dry fully before people and pets return to the area, and avoid applying when rain is expected on an outdoor treatment.

Wear the protective equipment the label requires, which typically means gloves and eye protection while mixing and spraying, and ventilate any interior space you treat. Cover or remove food, dishes, pet bowls and aquariums before application, and keep children and pets out of the area until surfaces are dry.

Store the concentrate in its original container, tightly closed, away from food and out of reach of children. Rinse the sprayer as directed after use, do not pour rinse water into a storm drain, and dispose of any excess according to local rules.

Demand CS is Syngenta's microencapsulated lambda-cyhalothrin concentrate, and the capsule technology is the point. On porous surfaces such as concrete, brick and unfinished wood, a conventional spray can be absorbed and lost quickly. The encapsulated formula is designed to sit on the surface and release over time, which is why it is a staple of commercial pest programs.

For a roach program it plays the same role as any residual: perimeter bands, entry points, thresholds and the label approved interior sites, working alongside a bait rather than replacing it. Low odor and a light visible deposit make it more pleasant to use indoors than many older chemistries.

The barriers are cost and complexity. An 8 ounce bottle costs more up front than a retail jug, even though it yields far more finished spray, and it assumes you own a sprayer and will read the mixing table properly. Like other pyrethroids it is highly toxic to fish and other aquatic life.

Bottom line: the pick when you want a professional residual with staying power on rough surfaces and you are comfortable mixing your own.

• Active ingredient: lambda-cyhalothrin
• Formulation: microencapsulated capsule suspension
• Size: 8 ounces
• Target pests: roaches, ants, spiders and other listed insects
• Use sites: indoor and outdoor applications permitted by the label
• Equipment: standard pump sprayer, supplied by the user
• Mixing rate: per the label for the pest and surface treated

Choose Demand CS over a basic concentrate when the surfaces you are treating are porous, when you want a low odor product for interior label sites, or when you are treating a property large enough that yield per bottle matters more than the price on the shelf.

Stay with a ready to use product if you do not own a sprayer and do not intend to buy one. A concentrate you mix incorrectly is worse than a simpler product used correctly, and the label is the authority on both the rate and the site.

Wear gloves and eye protection while measuring and mixing, ventilate interior spaces during application and drying, and keep children and pets away until treated surfaces are completely dry. Cover aquariums and remove pet bowls before you spray.

Store the bottle upright in its original container, tightly closed, away from food and out of reach of children. Follow the manufacturer directions for sprayer rinsing and disposal, and never pour leftover mix into a drain or waterway.

Demon Max is the product on this list that behaves least like a consumer purchase. It arrives as a concentrated liquid at 25.3 percent cypermethrin, and a single pint dilutes into a large volume of finished spray, which is why the cost per treated square foot is a fraction of any ready to use bottle.

Used correctly it is an exterior tool. A treated band along the foundation, around door thresholds, under siding edges and at every pipe and cable penetration intercepts roaches before they get inside, and the residue holds up on those surfaces for weeks. That is a genuinely different job from anything a bait station does.

Used incorrectly it causes the classic failure. Sprayed across an indoor kitchen it leaves a residue roaches will not cross, which fences them away from the bait you paid for and pushes them deeper into voids you cannot reach. It also demands measuring, a working pump sprayer, and the protective equipment the label specifies, which is more commitment than some buyers expect.

Bottom line: excellent value and genuinely effective for exterior perimeter work, and the wrong product for anyone who wants to point a bottle at a roach in the kitchen.

• Format: liquid concentrate for dilution
• Active ingredient: cypermethrin, 25.3 percent
• Size: one pint
• Equipment needed: pump or backpack sprayer
• Primary use: exterior perimeter and entry points
• Mode of action: contact and residual

Measure the dilution rate on the label for your target pest and site, mix only what you will use in one session, and agitate the sprayer as you work. Treat a band along the foundation, the door thresholds, the garage perimeter, window frames and every utility penetration.

Do not spray indoors over or near bait placements. Keep the interior for bait and dust, and let the concentrate do the outdoor work where its residual strength is an advantage.

Wear the protective equipment listed on the label when handling the concentrate, mix outdoors or in a well ventilated space, and keep children and pets away from treated surfaces until they are completely dry.

Never decant the concentrate into an unlabelled container, and store it locked away from living areas. Cypermethrin is toxic to fish, so keep the spray away from ponds and storm drains.

These tablets are the answer to the most common objection to boric acid, which is that nobody wants white powder drifting around a kitchen. Harris presses boric acid together with a lure into small tablets you place by hand, so the active ingredient stays where you put it and nothing settles on a surface you later lean on.

Placement is where they shine. The label directs you to sites like the space under and behind the refrigerator, stove, sinks, tubs, dishwasher, washing machine and dryer, into openings around drains and pipes, and into cracks along baseboards and cabinet corners. It also suggests pulling out lower kitchen and bathroom drawers and dropping tablets into the empty drawer wells, an enclosed space roaches use constantly and homeowners almost never treat. Because you place a known number in known spots, you can go back and check or remove them.

The limits are real. The tablets carry a lower boric acid concentration than the dusts here, since the rest of the tablet is the bait that convinces a roach to feed, and the label caps you at no more than twelve tablets per room. A tablet also cannot travel into a wall void, so deep harborage stays untouched. This is why we treat tablets as a companion to a dust in a serious infestation rather than a replacement for one. The rating on this product runs a little lower than its siblings, and the pattern in feedback is people expecting a dust level knockdown from a bait format.

Bottom line: the best choice when loose powder is a non starter, and an excellent partner to a dust when you want cabinets and drawers covered without residue.

• Format: pressed bait tablets with formulated lure
• Active ingredient: boric acid, 40 percent
• Container: 6 oz package, approximately 145 tablets
• Maximum placement: no more than twelve tablets per room
• Labeled pests: cockroaches and other insects named on the label
• Registration: EPA registered insecticide
• Residue: none on treated surfaces when placed correctly

Work through the label sites methodically: under and behind the refrigerator, stove, sinks, tubs, dishwasher, washing machine and dryer, into openings around drains, water pipes and electrical conduits, and into cracks and crevices along baseboards and in the corners of cabinets, cupboards and closets.

Remove the lower drawers in kitchen and bathroom cabinets and in bedroom dressers, then place tablets in the drawer wells before sliding the drawers back. Any tablet still visible after placement must be pressed into a crack or removed, and the label allows no more than twelve tablets in any one room.

Tablets are still an insecticide and boric acid is toxic if swallowed. Place them only where children and pets cannot reach or dislodge them, which rules out open floor edges, the backs of accessible low shelves and anywhere a dog can nose around.

Keep them away from food, dishes, food preparation surfaces, pet bowls and pet bedding, and store the package closed and out of reach. If a child or animal swallows a tablet, call Poison Control or your local emergency number right away with the label in hand.

Wondercide's outdoor concentrate is the minimum risk option on this list. The active ingredient is cedarwood oil, and the product is designed for yard and perimeter treatment rather than for the crack and crevice work that a roach infestation inside a kitchen demands.

Households pick it for a specific reason: they want to reduce outdoor insect pressure without applying a synthetic pyrethroid around a yard where dogs, cats and children play. Within that brief it is straightforward to use, mixing into a hose end or pump sprayer and covering a typical yard from one bottle.

Set expectations correctly. A botanical concentrate does not leave the long lasting residual film that bifenthrin or lambda-cyhalothrin leaves, so reapplication is more frequent, especially after rain. It also does not replace an indoor bait if roaches are already established inside the structure.

Bottom line: a reasonable outdoor companion for a household that prefers a plant based product, used alongside an indoor bait rather than instead of one.

• Active ingredient: cedarwood oil
• Format: liquid concentrate for dilution with water
• Size: 32 ounces
• Target pests: mosquitoes, ants, roaches and other listed outdoor insects
• Use sites: yard, lawn and exterior perimeter
• Equipment: hose end or pump sprayer
• Reapplication: repeat per the label, particularly after rain

This one suits homes with pets and children where the yard sees constant use and a plant based product is the preference. It also fits a maintenance routine, keeping outdoor pressure down between the seasonal peaks.

It is not the right pick if roaches are already breeding inside the house. In that case start with a gel bait indoors, add a perimeter treatment, and use this outdoors only if a botanical product is what you want in the yard.

Minimum risk does not mean no precautions. Read the label, follow the mixing rate and the listed use sites, and keep children and pets off treated areas until they have dried. Avoid spraying directly onto pets, ponds or vegetable foliage unless the label specifically permits it.

Store the bottle closed in its original container, away from food and out of reach of children, and rinse the sprayer after use as the manufacturer directs.