The robotic arm platform is designed to repair a small tear in the protective lining inside an underground concrete valve-and-piping enclosure. The damaged liner, which prevents any leaks from contacting the porous concrete below and seeping through to the soil, had to be repaired before the valve pit could be put back into service. The robotic system is based on the Universal Robot UR10 (covered in yellow protective plastic sheeting) that holds a battery operated sealant gun and manually operated seam roller.