How big of a leak will Aeroseal seal? Up to a 5/8th inch round hole can be sealed by Aeroseal. By Advanced| 2018-10-18T16:04:05+00:00 October 18th, 2018|Comments Off on How big of a leak will Aeroseal seal? Share This Story, Choose Your Platform! FacebookTwitterLinkedinRedditTumblrGoogle+PinterestVkEmail About the Author: Advanced