Workers attempting to clean up the cement-filled Victoria Line signal room rushed to a local supermarket to buy bags of sugar to prevent it from setting.
Victoria Line services were closed between Warren Street in the centre of the capital and Brixton in the south after a cement leak from a nearby construction area damaged the control room.
The problem has since been resolved and the line was once again running a good service.
The operations director for the Bakerloo, Central and Victoria lines paid tribute to the engineers who "worked tirelessly through the night" to repair the damage.
More top news
A bungling robber who left his phone at crime scene has been jailed for more than three years.
Four police officers set to face misconduct hearings after a Jury in the Henry Hicks inquest returned a narrative verdict.
A British passport spoof 'have to take safety precautions when leaving house' video has hit 650,000 views on Facebook.