The chalk spray is a chalk based pigment spray that is ideal for outdoor temporary marking as well as for indoor studio artwork. Available in 10 powerful colour shades that are deep matte and high covering. Montana CHALKSPRAY can be applied on various surfaces such as pavements, walls, cardboard or canvas. Depending on weather conditions and climate outdoor marking lasts between several days to several weeks. It fades quickly during extended periods of rain or in high traffic areas. On non-porous surfaces like glass or metal the pigments can be removed easily. Removal from porous surfaces may take longer. Montana CHALKSPRAY impresses by its feel and look - the typical rough chalk effect. A non permanent pigment based spray. Adheres to most surfaces and can be washed away with water. Strong opaque colours ideal for temporary artworks. Colours can be made permanent when varnished. Non Toxic.