Seal and prepare walls and ceilings with Crown's quick drying Stain Block Primer in White, providing a protective basecoat to ensure smooth and even paint application on problem walls inside the home. With a water based formulation that's touch dry in just 30 minutes, this high performance primer covers and seals stubborn stains including water stains, nicotine and smoke stains, crayon and pen, preventing them from bleeding through your topcoat of paint. Vegan Verified Breatheasy® Blocks stubborn stains For a perfect base Easy to apply