Abstract: A method of sealing pipes or ducts with a duct coating applicator having a camera mounted thereon. The duct coating applicator sprays plural compounds on an interior of the duct. A duct coating applicator mounted camera records a video of an inside of the duct. The video is quickly accessible for customer review on site. A customer billing statement is quickly generated on site. A controller communicates with the nozzle carriage. A pump feeds the duct coating applicator from a resin tank via a resin supply line. The controller receives resin temperature and pressure, duct diameter, and duct coating applicator speed data and can adjust resin feed and duct coating applicator speed rates. The duct coating applicator has a cylindrical body having an outer member and a core member. An adjustable nozzle is on an outlet end for dispersing resin. Extension arms may be adjusted to accommodate various duct sizes.