Not recommended for outdoor use! Only water-proof when sealed with several coats of Montana VARNISH and correct surface coating (Primer). Applicable on many different surfaces such as paper, cardboard, primed canvas, wood, glass, metal, ceramics, porcelain, stone, polystyrene and other paintable acrylic materials. The Montana GRANIT effect is very high covering. For best results it is advisable to prime your surface when using light colored granite effect shades, particularly when painting on dark surfaces. We recommend using the Montana PRIMER or the Montana TEXTURE spray. The latter will enhance the granite look even more. Can be top-coated once thoroughly dry. Can be combined with Montana GOLD, Montana ACRYLIC markers and standard acrylic paints. The GRANIT effect spray also works well as a structure spray. Lightly coat dry areas to receive the desired granite-look. Color shown on top or donut. Recommended to seal with Montana VARNISH. Make sure that Granit effect is completely dried (36-48h) before sealing with Montana VARNISH. Available in colors: light grey, grey, brown and black. Please Note: GRANIT Black has a mix of green an black plastic particles to recreate the look of real granite. Montana GOLD Shock Black could be applied as a top coat once completely dry if desired.