100% Acrylic transparent primer for porous surfaces. High quality transparent acrylic solvent primer for porous surfaces. It is used as a primer for painting with plastic and acrylic paints and is mainly suitable for exterior masonry surfaces made of concrete, plaster, gypsum board, cement board, etc. It reduces the alkalinity of the substrates. It is also ideal for waterproofing roofs, it offers strong penetration on porous surfaces such as plaster, cement, etc. It stabilizes the substrates to be painted, ensuring excellent adhesion between the surface and the final paint. It is ideal for surfaces painted with glue, watercolor or whitewash.