Daler Rowney Black Gesso Primer is a unique formulation which needs no dilution. Highly adhesive, ideal for directly sealing all semi-absorbent surfaces before applying colour - both acrylics and oils. Daler Rowney gesso primer is suitable for both interior and exterior applications. It dries quickly to produce a matt black surface with a slight tooth, which is easily sanded for highly detailed work. If used as a ground for acrylics one coat is normally sufficient, but up to three coats may be required for oil colour. Black 250ml Pot.