Fipronil mechanism of action diagram

How fipronil works — illustrated mechanism of action · PestControlBasics.com

Licensed Only CAUTION

Fipronil Bait — Maxforce FC Magnum

Active ingredient: fipronil (gel bait formulation)  ·  Residual: Up to 12 months sealed

⚠️ Don't buy duplicates. All brands listed contain the same active ingredient. Buying two different brands is buying the same pesticide twice.
⚖️ Educational use only. Always read and follow the full product label — the label is the law under FIFRA. Full disclaimer → | ⚗️ Mixing Calculator →

🏷️ Brand Names — Same Active Ingredient

Maxforce FC Magnum — Bayer — high bait load cockroach gel
Maxforce FC Select — Bayer — German cockroach bait
Maxforce Impact — Bayer — broad-spectrum cockroach
Maxforce Ant Bait Gel — Bayer — ant control

🎯 What It Kills

✓ German Cockroaches✓ American Cockroaches✓ Oriental Cockroaches✓ Ants

⚙️ How It Works

Maxforce uses fipronil at 0.01% — extremely low concentration with high transfer effect. Cockroaches carry fipronil back to harborage, transferring to others through contact and feeding on dead roaches. Colony-level kill.

⚗️ Mixing & Application

Match-head size placements every 12–18 inches in harborage. Do not spray near bait. Replace monthly. Rotate with Advion (indoxacarb) for resistance management.
Example
0.5 oz
per gallon
⚗️ Mixing Calculator
Enter your sprayer size and target rate — get the exact amount to pour. Backpack, hand sprayer, hose-end, or skid unit.
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⚠️ Safety

  • ⚠ Never spray insecticide where gel bait is applied
  • ⚠ Rotate with Advion for resistance management
  • ⚠ Keep out of reach of children and pets — place in inaccessible crevices

🐛 Pests This Treats — Learn More

Click any pest to view its full identification guide, biology, and treatment options.

🐛 American Cockroach → 🐛 Ants → 🐛 Cockroaches → 🐛 Oriental Cockroach → 🐛 Scales → 🐛 Ticks →

🌿 Environmental & Ecological Impact

🐝 Bees / PollinatorsVERY HIGH
🐟 Fish / Aquatic LifeMODERATE
🐦 BirdsMODERATE
🐕 Mammals / PetsLOW
🦐 Aquatic InvertebratesVERY HIGH
💡 Extremely toxic to bees and aquatic invertebrates. Used at very low concentrations in baits to minimize exposure.

⏱️ Residual & Re-entry Timeline

🔹
Apply
Follow label mixing and application rates
🔸
Re-entry: 2–4 hours
Keep people and pets out of treated area
🟢
Effective period: Up to 12 months sealed
Active residual — killing or repelling target pests
🔄
Reapply
Re-treat when pest activity returns or residual expires

🔄 Alternatives & Related Products

Same chemical class or different approaches to the same pests.

↔️
Pyrethrin
Different approach: Botanical Pyrethrin
↔️
Boric Acid
Different approach: Inorganic

❓ Frequently Asked Questions

Q: Is fipronil safe for pets?
Follow the product label. Keep pets out of treated areas until completely dried (2–4 hours for sprays). Once dry, treated surfaces pose minimal risk to dogs and cats.
Q: Can I use fipronil indoors?
Check the specific product label — formulations vary. Baits and dusts often have indoor labeling; concentrates and granulars are typically outdoor.
Q: How long does fipronil last after application?
Residual varies by formulation, surface type, weather, and UV exposure. Indoor applications last longer than outdoor. Check the product label for re-application intervals.
Q: What should I do if exposed?
Remove contaminated clothing, wash skin with soap and water. For eye contact, rinse 15–20 minutes. For ingestion or severe symptoms, call Poison Control (1-800-222-1222). Have the product label available.

📋 Safety Data Sheet (SDS)

📋

Maxforce FC Magnum — Safety Data Sheet

View the official SDS document for this product directly on the CDMS label database.

Maxforce FC Magnum Safety Data Sheet page 1
📄 Maxforce FC Magnum — Safety Data Sheet · View the complete SDS document above or download below
📚 Sources: EPA Pesticide Labels · NPIC Pesticide Info
Published: Jan 1, 2025 · Updated: Apr 7, 2026
🔮
Reviewed by Derek GiordanoContent reviewed by a licensed pest management professional and cross-referenced against EPA, university extension, and manufacturer technical data. Last reviewed: April 2026.