Primers and stabilisers for masonry and concrete designed to regulate substrate absorption and prepare mineral surfaces for coating systems. Acrylic primers, masonry stabilisers and penetrating sealers consolidate friable substrates, strengthen weak surfaces and promote adhesion of subsequent coatings. These preparation systems improve coating durability by controlling porosity across concrete, brick and masonry substrates. Suitable for interior and exterior building surfaces including walls, façades, garages and workshops where porous mineral substrates require stabilisation prior to decorative or protective coatings.