Pebeo Masking Gum 250ml For temporarily covering spaces on a canvas, notebook or paper. Refillable marker, easy to use and suitable for handling by children.  Its 4mm round tip is ideal for drawing and detailing. It prevents watercolour or paint from sticking to parts where masking fluid has been applied. It can also be used with water-based and spray inks. Once dry, it is easily removed with the fingers. Quantity: 250ml. Brand: Pebeo