It is -15℃ for LS series, H1 series and GOLD series.
*Supplement: There are some cases where the lubricant is working in the environment around -20℃, but it is basically difficult. If the place where the lubricant is used is constantly moving, the metal may move because it has heat. However, lubrication cannot be expected at places where it has been stopped for a while, due to dew condensation.