10 Best Carpenter Ant Killers 2025 in the United States

The TERRO T300B Indoor Liquid Ant Killer with 12 bait stations is a highly effective solution for tackling indoor ant infestations. Its active ingredient, Borax, is well-known for its ant-killing properties. This liquid formulation ensures that ants are quickly attracted to the bait, which they then carry back to the colony, leading to a noticeable reduction in ant activity within a few days. This makes it an excellent choice for those dealing with a widespread ant problem indoors.

The product's design allows for easy placement along baseboards, in corners, and on counters, effectively targeting common household ants such as acrobat, crazy, ghost, little black, odorous house, and pavement ants, among others. Users will appreciate the ready-to-use feature, which requires no setup and provides a hassle-free application method.

Safety-wise, Borax is generally considered safe when used as directed, but it is always important to keep it out of reach of children and pets. The residual effect is strong as it continues to attract and kill ants over time, ensuring long-term control. The TERRO T300B is a reliable and user-friendly option for those needing an indoor ant control solution with minimal effort and maximum results.

The TERRO T1813B Outdoor Ready-to-Use Liquid Ant Bait Stake Killer Trap is designed to attract and eliminate common household ants, including carpenter ants, using 12 liquid bait stakes.

Its active ingredient effectively eliminates both the ants you see and those in the colony, ensuring a comprehensive solution. The liquid formulation is highly attractive to ants, leading them to consume the bait and share it with the colony, which helps in eradicating the entire nest within a few days. This makes it a fast-acting solution for ant infestations.

Another advantage is its ease of use; simply insert the stakes into the ground and cut the tab to activate, making it a hassle-free option for outdoor ant control. Its design is specifically tailored for outdoor use, addressing the issue at its source before ants can enter your home. The TERRO T1813B offers an effective, easy-to-use solution for outdoor ant control.

Amdro Ant Killer for Outdoor Home Perimeter is a liquid formula designed to control a wide range of ant species, including carpenter ants, making it a versatile choice for outdoor use. It’s best applied during early morning or evening hours when ants are active, and it’s important to avoid using it on wet ground or before rain to maintain effectiveness. This product is meant for treating lawns, garden beds, and areas around your home’s perimeter, helping prevent ants from invading indoors.

It works well as part of a combined approach with Amdro’s bait stations for extra protection. Its 12-ounce liquid formula is easy to handle and apply, but users should follow the application timing carefully to get the best results. Safety-wise, it should be used outdoors as directed and kept away from children and pets.

While the product does not specify a long-lasting residual effect, its reputation and customer ratings show it is reliable for regular use against ants, including carpenter ants. For those seeking a straightforward and trusted solution to reduce ant activity around a home’s exterior, Amdro provides a practical option, though indoor infestations might require additional treatments.