Ulano Extra Heavy Block Out No. 10 Extra Heavy Block Out No. 10 is a high-viscosity, non-flammable screen filler designed for effective single-coat coverage, particularly on coarse mesh. It dries efficiently, can be thinned with cold water for touch-ups, and is safe to use in unventilated spaces. This water-soluble product contains no organic solvents, making it ideal for various printing applications. It works with all mesh types and stencil systems, especially with non-aqueous inks. Key Features: High Viscosity: Ensures easy handling and effective coverage. Water-Soluble: Safe for unventilated rooms and free from organic solvents. Coarse Mesh Friendly: Provides excellent precision and coverage. Touch-Up Ready: Can be thinned with cold water for quick adjustments. Environmentally Friendly: Contains no VOCs and is biodegradable. Safe Disposal: Can be emptied down drains without harm. Durable Storage: 2-year shelf life when stored at room temperature (68-75°F/20-25°C). Green Color: Easy to identify during application. Bottom Line: Extra Heavy Block Out No. 10 is a safe, effective, and environmentally friendly solution for screen printing applications.