low viscosity grade 5 cps gives a much longer no track time urethane grade nitrocellulose toluene wet nitrocellulose with a maximum water content of 3 as well as toluene wet nitrocellulose with a maximum water content of 4 or alcohol wet nitrocellulose can be used in the paint compositions of this invention suitable and preferred ranges for the components of the nitrocellulose urethane binder of the paint composition of this invention are given below ______________________________________ molar equivalents suitable preferred______________________________________nitrocellulose 2 9 oh 5 8 ohhydroxyacrylic 1 8 oh 2 5 ohresinhydroxyfunctional 0 4 oh 0 3 ohplasticizerisocyanate resin 75 1 25 nco 85 1 15 ncoratio nco oh 75 1 0 to 1 15 1 0 85 1 0 to 1 0 1 0______________________________________ the paint compositions of this invention are typically formulated to maintain molar equivalents of isocyanate and hydroxyl group functionality or a slight excess of hydroxyl to ensure complete reaction of the isocyanate groups ratios with an excess of isocyanate exhibit slower drying rates a catalyst is preferably used to promote the reaction between the isocyanate and hydroxyl groups particularly when the paint is applied to cold road surfaces any catalyst commonly employed in urethane coating systems can.