Thank you for the enquiry. You may apply the mask in the day. Leave it on for a while though as it heals and dries out especially acne. Afterwards, wash with the Cleanser (soapfree), rinse off, apply a few drops of the Beta Hydroxy Gel, for toning, ex-foliating and improving acne and skin texture.
Lastly apply either the Moisturiser with SPF30 (which acts as a day/night moisturiser as well as a sunscreen) Or the Facial Moisturiser if you do not want an added sunscreen. Both will not block pores or cause acne.
Additionally, you may use the Glycolic acid peel a few times a week too. Leave on for approx. an hour, wash off and apply either of the moisturisers. It provides deeper peeling and improves the skin texture.