Montana Acrylic Paint Marker Fine 2mm Kent Blood Red Contains high quality water-based paint made with a high concentration of lightfast pigments that cover well It is water-proof and abrasion-proof and can be used on almost any surface, indoors and out (though when using outdoors it should be varnished) The paint is safe to use, it is solvent-free, ACMI approved and each marker carries the AP mark of non-toxicity