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 Hot Shot No Mess! Fogger is an aerosol insecticide designed to kill carpenter ants and other common bugs like spiders and fleas. It uses a mix of active ingredients including Tetramethrin and Cypermethrin, which are effective at killing pests on contact and continue working for up to six weeks. The fogger creates a fine, dry mist that can penetrate deep into cracks and crevices, helping to reach insects hiding out of sight. This makes it useful for enclosed spaces such as basements, attics, garages, and sheds. One nice feature is that it doesn’t require turning off pilot lights, making it slightly easier and safer to use indoors. The formula is non-staining and odorless, so it won’t leave a messy residue or strong smell behind. Each can covers about 2,000 cubic feet, which is enough for typical rooms or small spaces, though larger areas may require multiple cans.

A consideration is that because it is a fogger, you need to vacate the area during treatment and wait before re-entering, which may be inconvenient. While the product is USDA specified, it is important to carefully follow safety instructions since the chemicals can be harmful if misused. This fogger is well suited for people looking for a straightforward, no-mess way to treat enclosed indoor areas against carpenter ants and other bugs, especially if they want a residual effect without stains or odors. It is not ideal for outdoor use or open, large spaces where fog may disperse too quickly.

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.