Unifor is calling on the American owners of Windsor Salt to resume negotiations to end a strike that began in mid-February.
The owner, Stone Canyon Industries of Los Angeles, walked out Tuesday when it said the union reneged on things it earlier agreed to.
The company issued a news release saying "This past weekend, through intensive discussions, the Union [Unifor] and Windsor Salt appeared to have reached an agreement on nearly all outstanding proposals.
"The parties were discussing plans to end the strike and resume operations. On Monday afternoon, abruptly and surprisingly, Unifor Local 1959 reversed course and reneged on its agreement to certain critical issues. As a result of these regressive events, negotiations have again stalled."
The union staged a protest Wednesday at Windsor City Hall, pressing its call for negotiations to resume.
There has been a shortage of some types of salt such as water softener salt marketed by Ontario supermarket chains.
