ULANO Heavy Blockout No. 10 is a heavy, non-flammable, water-soluble screen filler with drying characteristics similar to indirect films. The high viscosity of ULANO Heavy Blockout No. 10 affords easier handling, and generally assures effective coverage in a single coating. Especially useful with coarse mesh. Can be used for touchups when thinned with cold water. Can be used in unventilated rooms since it contains no organic solvents. Recommended for use on all mesh, with all stencil systems. Use only with solvent-based or plastisol inks.