SIPTU officials met with Element Six representatives at the Shannon plant today to begin talks on improving the redundancy package offered to workers.
Yesterday the company announced it was laying off 370 of its 450-strong workforce.
The manufacturing and distribution sections are to close by next December.
SIPTU organiser Mary O’Donnell has condemned the offer made to workers as completely unsatisfactory.
The company has offered one week's pay for every year of service.
In a redundancy drive last December workers were offered six weeks' pay for each year of service.
Ms O’Donnell said workers are extremely angry and disappointed at the offer and would need more than six weeks not less in the current economic climate when alternative employment is almost impossible to maintain.
She added that some of the workers were there over 30 years and the current offer was poor reward for that commitment.
