Promac Bonding Liquid (Solvent-Based) is a penetrating bonding sealer designed to stabilise weak, chalky, and porous surfaces before painting. It works by soaking deep into the substrate, binding loose particles and creating a strong, uniform base for coatings.
 
Formulated to be alkali-resistant, it is suitable for use on surfaces such as cement plaster, gypsum, skim coats, and powdery fillers. By strengthening these substrates, it significantly improves adhesion and enhances the durability of the entire paint system.
 
This primer is ideal for both interior and exterior applications where surfaces are friable or unstable, ensuring that topcoats adhere properly and last longer.