When it comes to soy wax candles, I always add essential oils when the melted wax cools down at around 60°C (140°F). For beeswax, paraffin and gel wax candles, instead, I noticed that a higher temperature point creates a stronger blend – the temperature to add essential oils for those waxes is around 70°C (158°F).When it comes to soy wax candles, I always add essential oils when the melted wax cools down at around 60°C (140°F). For beeswax, paraffin and gel wax candles, instead, I noticed that a higher temperature point creates a stronger blend – the temperature to add essential oils for those waxes is around 70°C (158°F).When it comes to soy wax candles, I always add essential oils when the melted wax cools down at around 60°C (140°F). For beeswax, paraffin and gel wax candles, instead, I noticed that a higher temperature point creates a stronger blend – the temperature to add essential oils for those waxes is around 70°C (158°F).