How to Create a Liquid Spray of Boric Acid Using Powder

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To make a boric acid liquid spray from powder, follow these simple steps:

1. Gather the necessary materials: boric acid powder, water, a spray bottle, and a measuring cup.

2. Measure out one teaspoon of boric acid powder and pour it into the spray bottle.

3. Fill the spray bottle with one cup of water. Make sure to use warm water to help dissolve the powder more easily.

4. Screw the spray bottle cap tightly and shake well to mix the solution.

5. Your boric acid liquid spray is now ready to use. Spray it directly onto surfaces or areas where you want to eliminate pests, such as cockroaches or ants.

Remember to keep the spray bottle out of reach of children and pets, and always follow the instructions and safety precautions on the boric acid packaging.


Boric acid is a powder made from boron, a naturally occurring element. You can create a liquid spray of boric acid from powder to use as an insecticide and fungicide. While it is considered a weak acid, caution should be exercised when mixing and applying boric acid powder and sprays in and around the house.

Boric Acid vs. Borax

Boric acid and borax are both derived from boron. Boric acid is used in various products, including those for pest control and medicinal purposes, while borax powder is used for cleaning and doing laundry around the house. It is also used as a pesticide and fertilizer in the garden. Boric acid disrupts the digestive and nervous systems of pests when ingested and works best on insects that groom themselves and each other, such as ants and cockroaches.

Whether you are using boric acid or borax, avoid inhaling or ingesting the powder. Put on a dust mask, safety goggles, and gloves when mixing solutions or sprinkling boric acid powder into cracks and crevices to kill ants and roaches. Keep children and pets away from the treated areas.

Create a Liquid Spray of Boric Acid

To create a liquid spray of boric acid powder to combat ants and flying ants, mix 1 tablespoon of boric acid powder and 1 cup of water in a spray bottle. Shake it well and then spray the path that the ants are following inside and throughout your house. The spray will mask the scent trail and make it more difficult for the ants to follow it into your home.

Boric acid can also be used to eliminate mold. Put on protective gear and then add 1 cup of 12 percent hydrogen peroxide, 1 cup of warm water, and 2 to 3 tablespoons of boric acid powder to a spray bottle. Mix it well and then spray and saturate the moldy drywall or grout with the solution. Reapply in two to five minutes and allow the solution to work for 30 minutes.

Use the same boric acid solution to remove mold from the treated area. Wet a rag or microfiber cloth in the solution and wipe off the mold. After removing the mold, lightly spray the entire surface with the boric acid solution, using just enough to dampen the area. Use a fan to circulate the air and ensure that all surfaces are completely dry.

Utilize Boric Acid Powder for Insects

Boric acid powder is available in “puff” containers, small bottles, canisters, and bags. Sprinkle the fine powder into cracks and crevices in the kitchen, laundry room, and bathrooms, as well as under sinks, behind drainpipes, and in other areas where ants, fleas, cockroaches, silverfish, and water bugs (also known as American cockroaches and palmetto bugs) hide. Avoid using boric acid powders on countertops, food preparation areas, or near pet bowls. Vacuum any excess powder within 24 to 48 hours.

To create a poison that attracts ants and can be carried back to the nest, mix a solution of 1/2 to 1 teaspoon of boric acid powder, 1/2 cup of sugar, and 1 1/2 cups of water. Pour the solution over cotton balls placed in a recycled plastic container with ant- or roach-sized holes punched in the sides and top. Place the container where the insects enter the home or along an ant trail. Alternatively, you can purchase Terro liquid ant baits, which contain a borax-based liquid bait that works in a similar way.

Cockroaches are lured by foods such as peanut butter. Take a tablespoon of peanut butter and slightly heat it, then combine it with 1 teaspoon of boric acid powder. Transfer the mixture into bottle caps or spread it onto recycled plastic lids. Position these bait stations in areas where roaches are likely to discover them, such as underneath and behind cabinets. However, make sure to place them out of reach of children and pets.

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