SIPTU has called for an immediate meeting with the examiner responsible for Iceland supermarkets in Ireland over outstanding entitlements to wages, holiday pay and redundancy pay.
The union said that workers at the Iceland store in Waterford were informed yesterday evening that they had 30 minutes to leave the premises as the store was closing.
Staff decided to stage a sit-in protest over monies owed to them.
Sit-ins have been staged at a number of Iceland supermarkets since June when an examiner was appointed to Metron Stores, which operated 26 Iceland stores in the Republic.
Metron Stores was placed into examinership on the grounds that it was insolvent and unable to pay its debts of €36m.
"The company has the protection of the courts through examinership, the workers only have their union," said SIPTU Wholesale, Retail, Distribution and Related Sector Industrial Organiser, Mark Flynn.
"SIPTU is determined that these low-paid workers will not be abandoned. We call for an immediate meeting with the examiner to secure their outstanding entitlements and ensure a just resolution," Mr Flynn said.
On Monday, Iceland workers voiced their anger and frustration before the High Court over the manner they say they have been treated by their employer.
The court heard that the examiner, Joe Walsh, has been working with a proposed new investor and remains of the view that a survival plan for the company can be brought to fruition.
However, the court was also told that Metron may have to close several of its stores permanently.
The matter is due back before the High Court next month.
