Dublin’s new Lord Mayor, Cllr Dermot Lacey visited striking workers at the Irish Glass Bottle plant in Ringsend this afternoon.
The workers are protesting at the decision by the Ardagh Group, which owns the company, to reject a Labour Court recommendation on redundancy payments.
The plant is due to close on Friday with the loss of 380 jobs.
Workers will remain on picket until company honours the Labour Court proposals according to Mr Gerry Lynch, secretary of SIPTU's electronics and engineering branch.
Mr Lynch also called on the Taoiseach to "honour his commitment made in the Dáil last week" to resolve the issue.
According to the unions, the cost of the Labour Court proposals involving five weeks' wages for every year of service including statutory entitlements would be €25 million. Workers say this could be easily offset against the value of the lease for the 25-acre Ringsend site.
However, the company confirmed today that it has no plans to sell the site and the only collateral available for redundancy packages is the estimated €12 million worth of stock at the plant.
This equates to roughly two weeks pay plus statutory redundancy.
Yesterday the National Implementation Body said it would "keep in touch" with unions and management in the dispute.