What is the best sealant for mouse holes?

Author: Dr. Isabella Emard  |  Last update: Sunday, January 18, 2026

Silicone sealant has a number of advantages. It is non-toxic and safe for the building's residents, and can be used to keep rodents away because it is difficult to chew through.

What can I fill a hole with to stop mice?

- Steel Wool: This is a popular choice because mice cannot chew through it. Use it to fill smaller gaps. - Caulk: For cracks and small holes, silicone or acrylic caulk can be effective. Make sure it's specifically designed for exterior use if applying outside. - Foam Insulation: Expanding foam can fill larger gaps.

Will silicone sealant stop mice?

Silicone sealant is a non-toxic material and is ideal for keeping rodents away since it's tough for them to gnaw through. You must seal the spaces as early as possible because once the rodents infest the area it can be a headache to get them out. Also, professional pest-proofing might put a hole in your wallet.

What sealant is mouse proof?

The best sealant to keep rodents out is silicone sealant, such as silicone caulk. Silicone sealant is strong enough to combat mice teeth. But it's important to note that silicone caulk is dangerous to kids and pets if ingested. So, you'll want to keep kids and pets away when sealing your home from mice.

What material will mice not chew through?

Don't use plastic sheeting, wood, rubber or a screen to close off an area because the mice can gnaw right through it. A mixture of steel wool and caulking compound makes a good plug to seal small openings. You can't use steel wool on its own because the mice will be able to pull it out or chew through it.

Do This to Stop Mice and Pests

How much to seal a house from mice?

$600 would about cover a good sized permanent exclusion project. At the rate of $600/year, you will spend $2700 on mouse extermination over a period of five years.

What is the great stuff to stop mice?

Great Stuff™ Pestblock Insulating Foam Sealant is a ready-to-use foam sealant that expands up to 1” to take the shape of gaps, creating a long-lasting, airtight and water-resistant seal that blocks out spiders, ants, cockroaches, mice and more from entering the home without the use of pesticides.

Should I seal a mouse hole?

That being said, exterior mouse holes should be sealed with steel wool and caulk immediately upon discovering them. There's no sense in letting more mice into your home while you're busy trapping their cousins!

What do mice hate the most?

13 scents that mice hate and can help you to keep them away
  • Cinnamon. This has a strong and spicy aroma that mice probably hate. ...
  • Vinegar. Mix some water and vinegar in a spray bottle to mist any areas where they have been seen more often.
  • Dryer sheets. ...
  • Cloves/clove oil. ...
  • Peppermint oil. ...
  • Teabags. ...
  • Mint toothpaste. ...
  • Ammonia.

What can I put in a mouse hole in my yard?

The best mice hole filler for outdoor applications combines steel wool and caulk.

How do you keep mice away permanently?

To discourage mice, remove all food sources by storing grains, pet food, and other dry goods in metal containers. Make sure mice won't find nesting material by storing all soft, fluffy material like fabric, rugs and blankets in heavy plastic or metal boxes.

What filler prevents mice?

Rodent proofing paste is a gap filler that is fast to apply and is also known as a pest-repellent mastic that once in place blocks access for vermin.

What is the best sealant for mice?

Silicone sealant has a number of advantages. It is non-toxic and safe for the building's residents, and can be used to keep rodents away because it is difficult to chew through.

What is the number one mice repellent?

What is the most effective mice repellent? In our experience, the most effective mice repellent is the Rodents Away Odor Free Pouches. But if you're looking for the easiest DIY treatment to use, you can go the ultrasonic pest repellers route with the LONAOO ultrasonic repeller.

How do you fill holes to keep mice out?

Seal any holes you find to stop rodents from entering. Fill small holes with steel wool. Put caulk around the steel wool to keep it in place or use spray foam. Use lath screen or metal, cement, hardware cloth, or metal sheeting to fix larger holes.

Is there anything you can put around your house to keep mice out?

Mice have a very strong sense of smell and are often repelled by very strong odors like cinnamon, vinegar, dryer sheets, clove oil, peppermint, tea bags, and cayenne pepper.

Who to call to seal house from mice?

For help preventing and getting rid of mice infestations, call your local Orkin branch.

Will foam sealant keep mice out?

Spray foam insulation can deter mice by sealing gaps and cracks, reducing rodent activity. However, it is not a complete solution, as mice can still find entry points.

How do I get rid of mice in my house asap?

How to get rid of mice in your house
  1. Eliminate entry points.
  2. Use mouse traps.
  3. Choose the best bait for mouse traps.
  4. Proper placement of mouse traps is critical.
  5. Place bait stations carefully in the house.
  6. Good sanitation won't get rid of mice, but poor sanitation will attract them.

Will duct seal keep mice out?

You can keep rodents and bugs out of your home through duct sealing. Some of the things needed for effective duct sealing include screwdrivers (for opening vent entries), safety gloves, traps, baits, fine wire mesh, torch, soap and plastic bags for disposing off the dead rodents/ bugs.

What smell do mice hate?

The strong scent of peppermint is overwhelming to mice. Similarly, essential oils such as eucalyptus oil, bergamot oil, clove oil, and cinnamon oil are potent in keeping mice at bay. One study noted that eucalyptus oil applied once a day was more effective as a rat repellant than once a week.

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