Syngenta Advion Cockroach Gel Bait, 4 Tubes x 30-Grams, 1 Plunger and 2 Tips, German Roach Insect Pest Control, Indoor and Outdoor Use, Roach Killer Gel for American, German and Other Major Cockroach Species

A field-tested roach gel that earns its keep

I keep a small toolkit for pest interruptions at home and on rentals I help maintain. For cockroaches—especially stubborn German roaches—my go-to has become Advion gel. It’s a syringe-based bait that puts control back in your hands without foggers, heavy odors, or chasing roaches with contact sprays. After running it through multiple kitchens, a bathroom, and an outdoor wall that had persistent night activity, I’m confident saying this gel is one of the most efficient ways to turn an infestation around quickly and keep it down.

What you get and why the formula matters

The kit includes four 30-gram syringes, one reusable plunger, and two fine applicator tips. That’s enough bait for a full home treatment and multiple follow-ups. The active ingredient is 0.6% indoxacarb, a non-repellent insecticide. “Non-repellent” is key: roaches don’t avoid it, they feed on it. Indoxacarb is metabolically activated inside insects (often described as a targeted or “MetaActive” effect), which helps reduce impact on non-target organisms when you apply it where roaches actually travel.

Two qualities make this formula especially effective:
- It’s highly palatable. In the first nights after application, I consistently saw bait spots consumed or noticeably reduced.
- It leverages secondary transfer. Roaches that feed can spread the active ingredient to others via contact and in harborage sites, which accelerates control beyond the individual that fed.

There’s no strong odor, and the gel has enough body to stay where you put it without sagging—handy for vertical placements.

Application that actually fits how roaches live

Roach work is 50% bait and 50% placement. I prep by cleaning food residues, vacuuming crumbs, and reducing competing food sources (pet food, especially). Then I apply rice-grain to pea-sized dots in tight, dark, warm areas where roaches travel:

• Behind and beside the refrigerator and stove, along the back edge where the wall meets cabinets
• Hinges and corners inside base cabinets, particularly under the sink
• Drawer tracks, kick plates, and the gaps where countertop meets backsplash
• Bathroom vanity corners, laundry room utility areas, and around hot-water pipes
• Outdoors: under siding lips, masonry expansion joints, and behind utility boxes—anywhere out of direct sun and rain

The included tips let me place very small, precise dots. I avoid smearing; defined beads are easier for roaches to feed on and make cleanup simpler. I also avoid using repellent sprays or bleach on the same paths, because that can push roaches away from the bait.

A practical tip: label or photo-map your placements so you know where to check for consumption and where to refresh. And keep the syringe caps—recapping preserves the gel between sessions.

Real-world performance

Indoors, I typically see a clear response within 24–72 hours. The first night, activity sometimes seems to bump up as roaches leave harborage to feed. Then, over the next days, I find more carcasses and see fewer live roaches. In one heavy German roach kitchen, by day five I had very little nocturnal activity left on sticky monitors. By the two-week mark, sightings dropped to near zero, with occasional stragglers that a light re-bait handled.

Outdoors, on a block wall that had consistent nighttime American roach traffic, I tucked pea-sized placements in mortar gaps out of the weather. Bait consumption was obvious night to night, and visible numbers declined steadily within a week. Sun and rain do degrade any gel faster, so protected placements and periodic refresh are important.

The gel holds up well in indoor conditions for weeks, and the three-year shelf life means you can store the rest for future touch-ups.

Ease of use and small annoyances

Using the syringes is straightforward. The plunger gives good control, and the gel flows smoothly even for tiny dots. There’s minimal odor and cleanup is simple with a damp cloth or mild soap if you need to remove old placements. The instruction label is clear about where and how much to apply, which is helpful for first-time users.

A couple of caveats:
- Only two fine tips are included for four tubes. The gel can dry inside a tip between sessions, which can clog it. Recap promptly, and if a tip does clog, a pin and warm water usually restore flow. You can also dedicate one tip per active tube to avoid swapping.
- Don’t over-apply. Heavy smears dry faster and can be ignored by roaches. Frequent small placements in prime spots outperform a few big blobs.

None of these are deal-breakers, but they’re worth planning around.

Efficiency and coverage

Four 30-gram syringes are generous. In a typical two-bedroom apartment with moderate pressure, one to one-and-a-half tubes handled the initial round with plenty left for follow-ups. For a full single-family home or combined indoor/outdoor work, having four tubes is reassuring. Because tiny dots are effective, the bait goes much farther than you might expect.

Given the three-year product stability, you can treat, store the rest, and pull it out for maintenance if you see new pressure months later.

What it won’t do (and how to help it work better)

No bait is magic without cooperation on the environment. To get the most out of Advion gel:
- Reduce competition. Eliminate food residues, seal trash, and put pet food on a schedule.
- Avoid mixing modes in the same spots. Repellent sprays or heavy bleach along trails will push roaches away from bait. If you need sprays, keep them to non-overlapping areas or use non-repellent residuals.
- Rotate if needed. While Advion is widely accepted, severe infestations sometimes benefit from rotating bait formulations over time to avoid behavioral aversion.
- Pair with an IGR (insect growth regulator) if the infestation is entrenched. IGRs don’t kill adults outright but interrupt life cycles, which complements the fast knockdown from the gel.
- Be precise about safety. Keep bait off food-contact surfaces and out of reach of children and pets. The formulation is designed to be less risky to non-targets when used correctly, but it’s still a pesticide—treat it with care.

Who it’s best for

• DIYers who want fast, targeted control without heavy sprays or foggers
• Property managers who need repeatable results across multiple units
• Homes where low odor and discreet placements are priorities
• Situations with both indoor and sheltered outdoor activity

If you have extreme clutter, chronic moisture leaks, or can’t control competing food sources (e.g., a shared trash area), results will be slower and you’ll need more follow-up.

The bottom line

Advion gel checks the boxes that matter: it’s genuinely attractive to roaches, it spreads through a population via secondary transfer, and it’s easy to place precisely where it will be found. In my use, it produced visible reductions within days and near-elimination within a couple of weeks, without turning the space into a chemical fog or chasing insects with sprays.

I recommend Advion gel for anyone tackling German or American roach problems who’s willing to do basic prep and targeted placements. It isn’t the cheapest bait on the shelf, but it’s cost-effective compared to repeat foggers or a service call, and the four-tube kit with long shelf life makes ongoing maintenance straightforward. If you pair it with good sanitation and avoid repellent products in the same areas, it earns its reputation as a reliable, professional-grade solution.