Dry ice — solid carbon dioxide at around -109°F — can be used to clear rats out of outdoor burrows. The method works by sublimating into CO₂ gas that displaces oxygen inside the tunnel system.
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Key Process Steps
- Identify active burrows — look for clear entrances with freshly dug soil
- Prepare the dry ice — use protective gloves to handle chunks or pellets
- Insert into burrows — apply 4–6 ounces per tunnel, depending on size
- Seal the entrances — trap the gas inside using dirt or a heavy cloth
- Monitor and repeat — check for new activity over the following days
Stated Advantages
The method is considered humane, since rats lose consciousness quickly. It leaves no chemical residue, removes the risk of secondary poisoning to pets, costs relatively little, and requires minimal cleanup compared to traditional methods.
Safety Precautions
- Wear thick gloves at all times
- Use only in well-ventilated outdoor areas
- Keep away from children and pets
- Check local regulations before use
- Never apply indoors — CO₂ accumulation is a real hazard in enclosed spaces
Limitations
The method can't treat indoor infestations, takes significant labor across multiple burrows, and only addresses the current population — it does nothing to prevent future rats from moving in.
