British Paints Paint & Prime Doors, Windows & Trim helps save time, with an undercoat and topcoat in one. Suitable for use over water or oil-based topcoats, this hard-wearing and resilient paint requires no undercoat on most previously painted surfaces, and the mid-sheen Semi Gloss finish will stand up to the frequent wiping and scrubbing that accompanies high traffic areas of the home. Tint the White base to a wide range of British Paints trim paint colours. The non-yellowing formula will keep doors, window frames, skirtings and architraves looking clean, fresh and bright for longer — inside and out. Coverage: 14m² per litre.