Nawkaw Corporation…changing the color of masonry. Nawkaw Color Stain Technology utilizes a proprietary product line that enhances porous surfaces, regardless of age or condition. Known throughout the construction industry for the remarkable color blending capabilities for renovation and restoration projects, the color system changes the color of brick, block, mortar, concrete, precast, stucco and stone. All products are Low VOC and environmentally friendly water-based. They are also vapor permeable and penetrating, resistant to mold, mildew, and weather (including UV) and carry a 25-year warranty with Nawkaw applications.