Valspar® Acrylic Alkali-Resistant Primer is a 100% acrylic primer/sealer, specially formulated to resist “alkali burn” commonly associated with newcementitious substrates. Its special formulation provides excellent coverage, adhesion and ease of application. It dries fast, is nonyellowing and has excellent priming and sealing properties. Can be applied to all new cementitious substrates, such as masonry, stucco and cinder block with a pH of 6 to 13. Gives a mildew-resistant coating. For interior and exterior uses.