10 Best Carpenter Ant Killers 2026 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.

BioAdvanced Carpenter Ant & Termite Killer Plus is a liquid concentrate designed to control more than 75 different pests, including carpenter ants and termites, which are common wood-damaging insects. Its active ingredients are EPA-approved, making it a reliable choice for outdoor pest control around your home, such as lawns, decks, and landscaping. The product comes in a one-gallon bottle with a pump sprayer that has an adjustable nozzle, which makes applying the insecticide easier and more precise, even for those unfamiliar with pest control products.

It creates a protective barrier that can cover a large area—up to 21,000 square feet—helping to prevent infestations before they start. Because it targets a wide range of insects, it offers good value if you deal with various pests, not just carpenter ants. Since it is formulated for outdoor use only and requires mixing with water, it might not be the best pick if you need something ready-to-use or safe for indoor application.

While the product meets EPA specifications for safety, it is important to follow label instructions carefully to avoid exposure, especially around children and pets. This product is a solid option if you want a versatile, strong, and relatively easy-to-use outdoor treatment for carpenter ants and other pests, but users should handle the concentrate safely and be prepared to reapply as needed.