Two workers at the Owens Corning plant in Kansas City, Kan., were injured Wednesday morning when malfunctioning equipment sprayed them with hot asphalt, authorities said. They were performing maintenance on an asphalt tank, authorities said, when they were burned. They were taken to a hospital in critical condition, authorities said.

The asphalt was reportedly between 350 and 450 degrees, which The University of Kansas Hospital burn unit director said could burn through the full thickness of a person’s skin in a fraction of a second. As of Wednesday, the men remained in critical condition after the workplace accident, reports said.