Dulux Trade Aqua UniPrimer is a high-performance, fast-drying, water-based primer with advanced adhesion properties for all major interior & exterior substrates, including wood, metal uPVC, and glossy pre-painted surfaces. It penetrates porous substrates, seals surfaces, blocks significant stains and inhibits rust. Its excellent opacity and professional finish means it can also be used as an undercoat, making it the perfect solution for any project.