A process for obtaining oils of sesquiterpenes and sesquilactones and (-)-guaiol from the oil of Callitris intratropica, processes for encapsulation of the oil from Callitris intratropica, and the various uses of the oil and the encapsulated oil are described. The oils are suitable for various purposes in the personal care field, e.g. for the antimicrobial treatment of skin, mucosa and hair and of textile fibre materials, as an antimycotic against skin fungi and moulds, as an anti-inflammatory, as an acaricide against house dust mites and ticks, and for preserving cosmetic products.