Hot Stucco Primer is a 100% acrylic resin that is a rich pigmented primer/sealer designed for application to new masonry surfaces. Hot Stucco Primer is alkali resistant and may be applied to fresh stucco and masonry surfaces. There is no need to wait for the stucco to cure. Hot Stucco Primer may be applied after 24 hours of cure time. This primer is highly resistant to “Hot Stucco.”