Made up of a limewater and olive oil mixture, oil calcareous ointments are used to protect babies from diaper rash or allergies. It is 100% natural, and can also be applied on sunburn and other superficial skin burns. This type of ointment can be bought from the pharmacy for a reasonable price, or can be "homemade". To make 250ml of ointment, you need 125ml limewater and 125ml virgin olive oil. It is important to buy good quality olive oil as this affects the quality of the end product. For a more even mixture, a teaspoon of bee's wax can be added to the ointment.