Pinterest Facebook Twitter Email Sealing Penetrations 02:18 Properly sealing building penetrations can prevent drafts, mold and rot. Similar Topics: Flashing Healthy Home and Home Safety Mold Related Videos HGTV Dream Home 2011: Sealing the Windows 02:58 We Recommend Sealing Building Penetrations Pro Building Tips: Flexible Window Flashing Cuts Moisture Penetration Seal Ductwork with Mastic and Mesh Tape Air Sealing a Drafty House Sealing Floors Above Unconditioned Spaces How to Stop Interior Drafts