Rustins Grainfiller Paste Natural is supplied as a paste, which is thinned with white spirit for use. It is applied to wood before finishing to fill the pores, preventing sinking of the finish. The natural shade can be thinned with Rustins Wood Dye so that filling and staining can be carried out in one operation. It is a paste consisting of various fillers and pigments dispersed in an oleo-resinous medium, intended to fill the grain of all types of wood. It features variable particle size for exact filling, irrespective of the type of wood to which it is applied. Colour: Natural. Size: 230g.