The strike involving 240 workers, who are seeking a better compensation and redundancy package, will stop production at the factory.
Amicus' regional officer, Carl Lucas, said: "Workers at the plant have been offered the bare minimum statutory payments which the company have to make by law.
“We are looking for an enhanced redundancy package for workers who have given many years of loyal service and have been working as usual knowing fully that their jobs may go. The end of the 90-day consultation period is approaching and no adequate package has been offered.
“There is a minute possibility of the factory being saved but it is doubtful.”
Consultation will be on going until September 20. Dura have plans to transfer production to the Czech Republic.