Sto's StoColor Acryl Plus is an acrylic-based, vertical above-grade exterior wall coating for new concrete, stucco, and general masonry construction. Acryl Plus has excellent adhesion, it's weather-resistant, and its formula promotes color stability. It also reduces CO2 diffusion into concrete, protecting embedded reinforcing steel, and allows your substrate to breathe naturally while resisting blisters caused by trapped vapor.