Use expanding insulation foam to prevent wasps from building nests.
Check this affiliate link for the current price (Walmart): https://geni.us/PyFh
Here is the info listed on the Walmart product listing:
GE Gaps & Cracks Insulating Foam, Pack of 1, Yellow 12 oz Can
About this item
Expanding Foam Sealant: Foam expansion fills gaps and cracks up to 1-inch
Water-resistant & Airtight Seals: Suitable for interior or exterior use; helps prevent mildew and mold growth; blocks out moisture and pests
Weatherproof & Insulating Seals: Reduces drafts, helping lower energy costs
Excellent Adhesion: Compatible with most building materials; wood, vinyl, concrete, stone and more
Lifetime Guarantee: Cured sealant has advanced flexibility and premium durability needed to create a weatherproof seal that lasts
Color: Yellow
12 oz Can
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