Before you reach for your topcoat, it’s worth making sure your surface is properly prepared — and that’s where primers and undercoats come in. These essential base layers help you get better coverage, longer-lasting results, and a smoother, more even finish, no matter what you're painting.
Primers are designed to seal porous surfaces, block stains, and improve adhesion. They’re especially useful on bare wood, MDF, metal, or previously painted surfaces that have become chalky or flaky. For example, Zinsser Bulls Eye 1-2-3 is a popular water-based primer that sticks to almost anything — even glossy surfaces — and dries fast.
Undercoats, such as Dulux Trade Undercoat, are formulated to build opacity and create a uniform base for your chosen topcoat. While some modern primers include undercoating properties, like Ronseal Stays White 2 in 1 Primer and Paint, traditional systems still use separate products for best results. An undercoat can also help enhance the colour and sheen of your top layer, especially if you're making a dramatic colour change.
Together, primers and undercoats save you time and paint by creating the perfect foundation — and they help extend the life of the finish above them.
Key Features:
• Improves paint adhesion and durability
• Primers help to block stains, knots, and discolouration
• Undercoats provide an even, opaque base for topcoats
• Suitable for wood, metal, plaster, and masonry
• Available in water-based and solvent-based options
Summary:
Primers and undercoats are the unsung heroes of a professional-quality paint job. They prep the surface, even out imperfections, and help your topcoat go on smoothly — all while ensuring better coverage and a longer-lasting finish. Whether you’re painting indoors or out, they’re the smart way to start your next project.
