Dura-Seal 24 is the best exterior masonry primer. Allows you to prime a hot masonry surface after 24 hours. That’s 6 to 28 days sooner than competitive products. Dura-Seal 24 helps projects last up to 20 years.
Dura-Seal 24: Concrete & Masonry Primer adheres to all masonry and concrete surface after the substrate has cured for 24 hours. It will adhere to high pH level 13, and moisture content of 20%, allowing you to prime and top-coat much sooner than any other primer on the market.
Mad Dog Dura-Seal 24 is for new, peeling or weathered masonry surfaces. Extreme sun, rain, heat, cold, humidity & salt air formula.