Place the shea butter, coconut oil, argan oil, sweet almond oil, jojoba oil and beeswax into your heatproof bowl and place it into a saucepan filled with 5 cm (2 inches) of hot water that is sitting over a medium-low heat. (I make it in my steel KitchenAid mixing bowl to save on washing up, but you can also use a glass pyrex bowl)
Make sure that none of the water from the saucepan gets into your oils.
Gently stir until the ingredients have completely melted into a liquid and combined. Don't leave it sitting on the heat any longer than needed, as you don't want it to get too hot otherwise it could reduce the efficacy of the ingredients.
Remove the bowl from the saucepan and dry off the water from the outside of the bowl so it doesn’t drip onto your work surface and salve.
Place the mixture into the freezer for about 30 mins or fridge for about 60 mins, or until it has started to harden around the edges. If you live in a hot climate you may need to leave it cooling for longer. But don't let it completely cool, otherwise it will be too hard to whip.
Add the arrowroot powder and your essential oil and whip with your electric mixer until it turns white and becomes creamy and fluffy.
Place it in the fridge for 15 mins to cool down and firm up. If you live in a hot climate you may need to leave it longer.
Whip again with your electric mixer until fluffy and forming stiff peaks like firm meringue.
Place it back in the fridge for 10-15 mins to firm up again and dispense it into your containers.