Promac Plaster Primer (Water-Based) is a penetrating acrylic primer designed to prepare and seal porous surfaces before painting. It works by soaking into plaster and masonry substrates, creating a uniform base that ensures strong adhesion and improved topcoat performance.
 
This primer is ideal for use on plaster, concrete, brick, and cement surfaces, where it reduces surface porosity and prevents uneven absorption of paint. By sealing the substrate, it helps achieve better coverage and a more consistent final finish.
 
Formulated for both interior and exterior use, it offers a low-odour, easy-to-apply solution, making it suitable for DIY users and professionals alike. Its breathable nature allows moisture to escape while still protecting the surface, reducing the risk of peeling and paint failure.