How to protect bearings against cold (-60°C)

I am using a ball bearing mechanism to allow an horizontal rotation of the payload around the z axis, to compensate the rotation due to the wind.

To protect the bearings against the cold (-60° at target altitude), I found a grease made for that purpose, that is financially accessible.

It's made by the company "Univars" and is cold : Molykote 33 Medium Extreme Low Temperature Bearing Grease, and cost £11.

Here is the product :