The card does not say whether the aerosol can be sprayed on a fresh sunburn. Method of use: shake the bottle thoroughly and spray from 10–15 cm once or several times a day; avoid contact with the mucous membrane of the eyes. The claims about skin recovery after burns belong to the manufacturer's description and have no confirmation.
General information (not a manufacturer's instruction): in case of a severe burn, blisters, pain or fever, a doctor's consultation is needed.