Mohammed Chernarli, 31, of Mary Hill Road, Glasgow, and Mehdi Esmalpoor, 39, of Farm Drive, Rawmarsh, were sentenced to ten years in jail for drugs offences at Sheffield Crown Court on Wednesday.
Nehdi Tajabidi, 32, of no fixed address, was jailed for seven years.
The lab was in a property in Rotherham and police are now hunting the trio.
WANTED: Crystal meth trio who set up drugs lab in South Yorkshire bathroom
Three men who transformed the bathroom of a South Yorkshire house into a crystal meth lab are being hunted after going on the run.
Mohammed Chernarli, Mehdi Esmacpoor and Nehdi Tajabidi were today sentenced in their absence to a total of 27 years behind bars for producing the class A drug methyl amphetamine at a rented property in Rotherham.