No matter how "tight" your house is, a determined rodent can still find a way inside. Outdoor Mouse Magic repellent is a perimeter mouse repellent that makes your whole house less appealing to these rodents. It contains powerful yet non-toxic essential oils of spearmint and peppermint in a base of granulated corncobs. Just sprinkle around the house or garage to keep rodents and mice away. Indoors, sprinkle around entry points or runways, or fill a spare sock to make an anti-rodent sachet.