Unifor has taken over the Nemak plant by setting up blockades at the entrances to the facility in protest of a planned closure. (Ricardo Veneza/CTV Windsor)

WINDSOR -- Contract talks between Nemak and Unifor have broken off and no agreement has been reached.

The two sides were negotiating since Wednesday morning, trying to hammer out a deal.

Unifor wants the plant stay open until 2022, but Nemak wants to close it by next June.

This impasse resulted in a 13-day blockade of the west Windsor plant and three trips to court after the company sought and won an injunction against the union.

Now both sides will head to arbitration on Oct. 15.

“Nemak firmly believes that it is in full compliance of the Collective Agreement between Nemak and Unifor and is focused on how best to move forward” Nemak said in a statement issued Friday. “During this week’s negotiations, as in the past, the company has continued to express desire and intent to offer our people a fair transition package.”

The closure would put 173 employees out of a job, as the company moves the work to Mexico.

The Mexican-owned aluminum casting plant builds engine blocks for General Motors.