Conducted thorough cleaning and inspection of underground ductwork using RIDGID SeeSnake microReel inspection camera. Removed debris with Viper GForce air whip system. Identified and repaired holes in register vents using Quikrete Hydraulic Water-Stop Cement. Applied first coat of Duct Armor elastomeric sealant to all underground ducts using Graco Ultra Max II 495 PC Pro airless sprayer. Ensured even coverage and proper adhesion. This application seals minor leaks, improves airflow efficiency, and prevents moisture intrusion. Scheduled second application for optimal protection. Process significantly extends ductwork lifespan and enhances overall HVAC system performance.