Frost King F4 Mortite Caulking Cord 9-1/2-ounce 45-Feet Long, Grey by Frost King Go to amazon.com Related posts 14 best mortite caulking cord for 2022 FeatureFrost King F4 Mortite Caulking Cord 9-1/2-ounce 45-Feet Long, Grey45' DescriptionSeals in cool air;Presses into place with fingertips;Shuts out hot air, dust, dirt and insects;It is paintable;Easy to install