In damp conditions, untreated lead sheet will quickly generate a white carbonate layer, which rainfall will frequently transfer to neighbouring slates, tiles or brickwork causing unsightly stains.
Premium Patination Oil when applied to lead sheet, provides a permeable coating through which the metal surface will oxidise at a controlled rate. Over time this oxidised layer develops into a uniform dull grey adherent patina. This patina is stable, pleasing in appearance and replaces the protection initially supplied by the Patination Oil.
Premium Patination Oil should be applied to all visible lead surfaces, especially where rain water from these surfaces will run over exposed building materials. It is recommended that hidden surfaces, past which rain water may flow e.g. behind lead motifs and clips, should also be treated with Patination Oil before installation.
The oil should also be applied to new lead work before the end of the day of installation preferably out of direct sunlight, before the unsightly carbonate has a chance to form.