A stain-blocking, multi-purpose acrylic primer for interior and exterior use. Has excellent adhesion on a variety of substrates and can be applied on most architectural surfaces. Will provide excellent “grain crack resistance” and flexibility needed for the durability of exterior wood surfaces. Redwood and cedar exhibit excellent tannin stain resistance. Has excellent efflorescent and alkaline resistance which makes this product an excellent choice for stucco & and masonry substrates.