JOHANNESBURG - Sibanye-Stillwater said its employees' demands are unaffordable.
The company says it’s been trying to negotiate with unions for about 10 months now and many adjustments have been made.
Workers are demanding a R1,000 increase but the employer is only willing to offer R850.
Sibanye-Stillwater's James Wellsted said: "It’s been about a 10-month long process, it's been an extended engagement.
WATCH | Ramaphosa leaves May Day event
"At the end of last year  before the December break we actually paid back-pay on the current offer that we had on the table at that time to employees so that they would go home, at least with something, for the December break to share with their families. At that point, it was R450.
"We’ve subsequently moved our offer a number of times. On 4 February we offered R700 on the basic increase and R100 live-out allowance and then we recently on 19 April again adjusted that to an R800 basic increase and R50 live-out allowance. That contrasts with the union's R1,000 demand on basic and R100 live-out allowance. That’s quite a bit higher than where we are."