Speaking exclusively with 9News, Woolworths chief executive Amanda Bardwell has conceded she doesn't know when supermarket shelves will be restocked.

Woolworths has filed an urgent application with the Fair Work Commission to stop union members from blocking access to its distribution centres, as it claims the industrial action has cost the business $50 million so far.

Woolworths customers across Victoria will continue to face bare shelves following ongoing strike action at some of its key distribution centres.

An industrial dispute between Woolworths and its workers is at a standstill as union members continue to call for better conditions and shelves across three states grow empty. A key distribution centre for the grocery store remains closed after another day of negotiations between the united workers union and the retailer.

Woolworths warehouse workers say they will continue their strike until a pay deal is reached as supermarket shelves are left bare.

Woolworths shelves are empty and stock is low after five distribution centres across the eastern states were abandoned by striking workers.