From Benjamin Moore. Clear. Ultra Spec Masonry Interior/Exterior 100% Acrylic Sealer is designed to penetrate and seal the surface of new or previously painted masonry surfaces providing the proper foundation for subsequent finish coats. It can be applied to masonry and plaster surfaces with pH levels as high as 13.
For commercial and residential applications. For application to new or previously painted masonry and plaster surfaces including; tilt-up concrete construction, stucco surfaces and block construction.
Cover 200 sf - 400 sf per gallon. Masonry surfaces vary widely in terms of how much they will absorb.