20 Mule Team Borax can be used to repel a variety of household pests. Users report that small bugs such as ants are not as likely to enter a home where borax has been sprinkled at points of entry. Areas that have roaches can also be treated with borax.
Bedbugs are repelled by borax, so those suffering from bed bugs can sprinkle it around sleeping areas to prevent infestation and bites. Borax applied to carpets and then vacuumed several hours later will remove fleas and their eggs from the home, and when placed under appliances it will help prevent bugs.