"If we are pushed, we will ask for a secondary strike where all our members in different sectors will be called to support the same cause," Amcu president Joseph Mathunjwa told a news conference in Johannesburg.
The strike over job cuts at the world's largest platinum producer has already cost the company, also known as Amplats, about $39m in lost output and sent its share price down 9% since the walk-out started at the end of last month.
Amcu will not accept the retrenchment of permanent workers while
labour brokers and contractors are "protected" by Anglo American
Platinum (Amplats), the union said.
"One of the
fundamental speaking points in the draft agreement is the issue of
retrenching affected workers while the company still engages volumes of
labour hire contractors who are performing core functions that our
affected members can perform," Amcu president Joseph Mathunjwa said.
It is calling on Amplats to revise a job-cut plan by sacking contract workers ahead of regular staff who command higher salaries.
Amplats, a unit of global miner Anglo American, wants to cut about 4 800 jobs. It originally aimed to eliminate as many as 14 000, but scaled back its plans after fierce criticism from the government and unions.
The company and other platinum producers in the country home to about 80% of the world's know platinum reserves, have seen their finances squeezed by falling prices for the precious metal and rising labour costs.
But jobs are a sensitive issue as unemployment rate has been stuck for years at around 25% and the ruling African National Congress is facing national elections next year.
At the weekend, a four-week strike that crippled production in the car sector appeared to come to an end when union Numsa said it had reached a deal to end the labour action at auto components plants.