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 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.