Dealing with a cockroach infestation is a frustrating challenge for many households in Bangladesh. While the market is flooded with various sprays, gels, and powders, finding a solution that is both highly effective and safe for your family can be difficult.
To help you make an informed decision, we did not just rely on manufacturer claims—we put the most popular products to the test.
Our Testing Methodology
To determine the true performance of each cockroach killer, we designed a controlled testing environment to measure both efficacy and safety.
- The Enclosure: Each product was applied inside a sealed 10 feet by 10 feet testing container.
- The Subjects: For each individual test, we introduced 20 live specimens: 10 traditional large Bangladeshi cockroaches and 10 small “China” cockroaches (commonly known as German cockroaches).
- The Metrics: We monitored the containers over a 48-hour period. After 48 hours, we counted the total number of dead cockroaches, the number of cockroaches knocked down (paralyzed but still twitching), and the number that remained completely alive. We also noted the speed of action, odor, and safety profile of each product.
Here are the final rankings based on our comprehensive 48-hour performance tests.
Quick Comparison: 48-Hour Test Results
| Rank | Product Name | Total Dead | Knocked Down | Completely Alive | Odor & Safety Profile |
| #1 | Leeings Insect Killing Liquid | 9 | 11 | 0 | Odorless, 100% natural, safe for mammals |
| #2 | Korean Cleanbait Power Gel | 16 | 3 | 1 | No bad smell, safe gel application |
| #3 | NianJu Bait Powder | 15 | 3 | 2 | Low odor, localized application |
| #4 | Red HIT Anti-Roach Spray | 20 | 0 | 0 | Very bad smell, harmful to humans (caution required) |
| #5 | Green Leaf Roach Killer Powder | 11 | 5 | 4 | Low odor, powdery residue |
| #6 | ACI Cockroach Spray | 20 | 0 | 0 | Very bad smell, harmful to humans (caution required) |
| #7 | Dhaka Gel Cockroach Killer | 8 | 6 | 6 | No bad smell, localized gel |
| #8 | Dahao Small Gold Powder | 6 | 4 | 10 | Low odor, powdery residue |
| #9 | Finis Insect Powder | 10 | 6 | 4 | Noticeable unpleasant smell, dusty residue |
Detailed Performance Reviews
1. Leeings Insect Killing Liquid (Pest Control) – 500 ML
Overall Verdict: The Ultimate Balance of Total Elimination and Total Safety.
The Leeings Insect Killing Liquid takes our top spot because it offers a revolutionary approach to pest control. This product is 100% natural, tested, and certified to be completely harmless to humans and all types of mammals.
48-Hour Test Performance:
Out of 20 cockroaches, 9 were completely dead and 11 were severely knocked down. More importantly, zero cockroaches survived unaffected. Because it relies on natural botanical oils (like ginger, onion, and peppermint) rather than harsh synthetic chemicals, it takes slightly longer to kill. The remaining 11 knocked-down roaches showed clear signs of fatal nervous system failure and were on the verge of death.
Why It Stands Out
Unlike traditional chemical pesticides that emit harsh volatile organic compounds (VOCs), pungent fumes, or corrosive residues, Leeings Insect Killing Liquid offers an eco-friendly botanical solution. It is tested and certified completely harmless to all mammals, making it the safest option for households with babies, pregnant women, or indoor pets.
In addition to killing adult insects, its active natural botanical oil matrix penetrates and destroys insect eggs, breaking the breeding cycle at its root.
Key Botanical Ingredients
- Water Base (70%) – Provides clean, effortless spraying without oily stains.
- Ginger Oil (9%) & Onion Oil (7%) – Form the core neurological disrupting agents for crawling insects.
- Clove Oil (4%) & Chinaberry Oil (4%) – Act as natural egg destroyers and pest repellents.
- Peppermint Oil (3%) & Chrysanthemum Oil (1%) – Disrupt insect respiratory channels and scent trails.
- Neem Oil (1%) & Glycol (1%) – Act as bio-insecticides and binding stabilizers.
Step-by-Step Science: How the Botanical Liquid Works
Instead of emitting toxic gases, the natural oils form a microscopic layer where sprayed. Roaches walk over it without fear. Over the next 24 to 48 hours, the oils bind to their nerve receptors, causing them to stop feeding and eventually die deep within their nests. This creates a chain reaction when other roaches consume the dead bodies.
Because this product relies on biological plant extractions rather than synthetic nerve poisons, it does not always cause instant, dramatic paralysis upon contact. Instead, it works through a progressive four-stage cascade that targets the entire hidden nest:
- Phase 1: Application & Initial Contact (0–2 Minutes) If sprayed directly onto a cockroach, the botanical oil combination penetrates its cuticle and causes mortality within approximately an hour. If applied to surfaces, the water base evaporates over a few hours, leaving behind an invisible, non-sticky microscopic layer of active plant extracts.
- Phase 2: Contact & Transport (1–12 Hours) Because the formula contains no synthetic chemical repellents or artificial odors, cockroaches, bed bugs, and termites walk across treated surfaces without alarm. The natural oil compounds adhere to their legs and exoskeletons. The insects then carry these microscopic doses back inside walls, furniture, or floor cracks.
- Phase 3: Nervous System Shutdown (24–48 Hours) The active essential oils—particularly onion, ginger, and chrysanthemum derivatives—bind directly to the insect’s nervous system receptors. The pest experiences loss of motor control, ceases feeding, becomes lethargic, and dies quietly deep within its nesting site.
- Phase 4: Cascading Chain Reaction (3–7 Days) Cockroaches are cannibalistic by nature and frequently consume dead nest mates and fecal matter (coprophagy). When healthy roaches feed on a carcass containing the botanical oil residues, they absorb the same active compounds. This creates a domino effect that wipes out roaches that never directly crossed the sprayed area.
How to Apply
- For Cockroaches: Attach the included spray head, shake the bottle thoroughly, and spray along baseboards, behind refrigerators, under sinks, and inside dark kitchen cabinets.
- For Bed Bugs: Lightly mist mattresses, bed frames, seams, quilts, and surrounding wooden furniture. Allow 2 to 3 days for total elimination.
- For Termites & Woodworms: Spray directly onto infected timber, entry holes, and visible mud tubes to kill active workers and destroy hidden eggs.
Instruction of use:
You can try out the this insect killing solution from leeings to eliminate all the cockroaches from your home.
2. Korean Cleanbait Power Gel
Overall Verdict: The Best Deep-Nest Eradicator.
Korean Cleanbait Power Gel is widely used by professional pest control operators across Bangladesh. It comes packaged in an easy-to-use syringe applicator that allows precise placement in tiny gaps, hinge cracks, and electrical junction boxes.
How It Works
Cleanbait uses a food-based matrix containing high-grade attractants paired with a slow-acting metabolic toxicant (such as Fipronil or Hydramethylnon). Cockroaches are drawn to the gel, ingest it, and return to their harborages before dying. The primary feeder’s droppings and body then poison secondary feeders in the nest.
48-Hour Test Performance:
This product delivered excellent results. After 48 hours, 16 cockroaches were completely dead, 3 were knocked down, and only 1 remained alive. It emits no bad smell and is applied via a syringe, making it very safe to use around food preparation areas.
3. NianJu Cockroach Killing Bait Powder
NianJu Bait Powder is an economical and highly popular Chinese bait powder sold widely throughout Bangladeshi markets. It is formulated with potent food attractants mixed with a stomach poison that acts rapidly once consumed.
How It Works
The powder smells like food to hungry roaches. Users sprinkle small mounds of the powder onto bits of paper or cardboard and place them along pest highways. Once consumed, the active chemical disrupts the cockroach’s digestive tract, causing death within hours.
48-Hour Test Performance:
It performed remarkably well in our test box. Out of 20 subjects, 15 were completely dead after two days, 3 were knocked down, and 2 remained alive. It is an affordable and highly reliable option for controlling moderate infestations in dark, damp corners.
4. Red HIT Anti-Roach Spray
Overall Verdict: The Fastest Kill, but Requires Extreme Caution.
Red HIT is one of the most recognizable consumer pest control brands in Bangladesh. It features a high-pressure aerosol nozzle with a thin extendable straw attachment designed specifically to penetrate deep wall cracks and cabinet gaps.
How It Works
Formulated with fast-acting synthetic pyrethroids (such as Cypermethrin and Transfluthrin), Red HIT attacks the insect’s central nervous system on contact, causing instant paralysis (“knockdown”) and rapid death within seconds.
48-Hour Test Performance:
In terms of pure speed, Red HIT was unmatched—it killed all 20 cockroaches in just 10 minutes. However, it ranks at number 4 due to its severe health profile. The spray emits a very strong, unpleasant chemical odor and causes immediate breathing issues. The product body carries clear caution marks, and we strongly advise against using this around children, pets, or poorly ventilated rooms.
5. Green Leaf Roach Killer Bait Powder
Overall Verdict: The Budget-Friendly Standard.
Green Leaf Roach Killer is arguably the most common budget-friendly bait sachet found in local Bangladeshi grocery shops. The distinctive green packaging contains a finely milled powder bait that attracts all common cockroach species (German, American, and Oriental).
How It Works
Green Leaf acts as a stomach toxicant. Roaches ingest the dry powder, experience severe internal dehydration, and die. Because it is slow-acting, affected roaches often carry particles back to their nests, providing mild cascading control.
48-Hour Test Performance:
It provided solid, middle-of-the-road results. After 48 hours, 11 cockroaches were completely dead, 5 were knocked down, and 4 managed to stay completely alive. While not as potent as the top three, it remains a cost-effective option for ongoing maintenance.
6. ACI Cockroach Spray
Overall Verdict: Fast Local Spray with High Chemical Impact.
Produced by ACI Limited, one of Bangladesh’s leading consumer goods and chemical conglomerates, ACI Cockroach Spray is engineered specifically to combat the pest species common in local urban environments.
How It Works
Using a balanced synthetic insecticide formula, ACI Cockroach Spray offers dual benefit: immediate contact knockdown upon direct spraying, alongside a long-lasting chemical film on applied surfaces that deters crawling insects for up to two weeks.
48-Hour Test Performance:
Similar to Red HIT, ACI wiped out all 20 cockroaches rapidly, taking just 20 minutes to clear the test box. However, it suffers from the same critical drawbacks. The harsh chemical formula is not safe for human health, causes respiratory irritation, leaves a very bad smell, and carries strict caution warnings. Use it only for absolute emergencies and ensure you leave the room immediately after spraying.
7. Dhaka Gel Cockroach Killer
Overall Verdict: The Economical Gel Alternative.
Dhaka Gel Cockroach Killer is a locally manufactured gel bait alternative created to provide the performance of imported gel syringes at a fraction of the price.
How It Works
Formulated specifically to withstand Bangladesh’s elevated humidity levels, Dhaka Gel does not dry out quickly after application. Tiny pea-sized dots placed around the home attract adult roaches and nymphs alike, delivering a lethal stomach poison that spreads through harborage sharing.
48-Hour Test Performance:
Its performance was moderate. After 48 hours, 8 roaches were completely dead, 6 were knocked down, and 6 remained completely alive. It is a decent option if you are on a strict budget, but you may need to apply it more frequently than premium gels.
8. Dahao Small Gold Powder
Overall Verdict: Classic Bait for Light Infestations.
Imported from China, Dahao Small Gold Powder has earned a strong reputation among Bangladeshi households for its potency against stubborn, pesticide-resistant roach populations.
How It Works
Dahao relies on a potent bait blend that triggers intense dehydration upon ingestion. After consuming the gold powder, cockroaches experience severe thirst, forcing them out of their dark wall harborages toward open floor spaces or water sources before they collapse.
48-Hour Test Performance:
It struggled slightly in our heavy-infestation test. After 48 hours, only 6 cockroaches were dead, 4 were knocked down, and exactly half (10) remained completely active. It is best used for very light maintenance rather than active pest eradication.
9. Finis Insect Powder
Overall Verdict: A Multi-Pest Barrier Dust.
Finis is a heritage pest control brand in Bangladesh with a decades-long track record. Their traditional insect powder remains a staple for perimeter defense against crawling insects.
How It Works
Unlike sprays that evaporate or gels that get eaten, Finis Powder is a dusting powder that acts both mechanically and chemically. When insects walk over the powder, the dust clings to their bodies, eroding their protective waxy outer coating and causing fatal dehydration while delivering a contact toxicant.
48-Hour Test Performance:
The results were decent: 10 dead, 6 knocked down, and 4 completely alive after 48 hours. However, it ranks lower on our list because the powder itself emits a noticeably unpleasant smell and leaves a messy dust residue on your floors, making it less ideal for modern indoor living spaces.
Final Recommendation
When choosing a cockroach killer, you have to weigh speed against safety. Sprays like Red HIT and ACI will kill insects instantly, but the harsh chemicals and breathing hazards make them risky for regular indoor use.
If you want the ultimate peace of mind, the Leeings Insect Killing Liquid is the clear winner. Our tests proved that it successfully targets and eliminates the entire roach population (with 0 roaches surviving) without introducing a single harmful chemical or bad odor into your home.
