The Dulux Prepcoat Acrylic Sealer Undercoat is a premium acrylic sealer and undercoat designed to prepare and prime interior surfaces before applying topcoat paints. This water-based formula features Ultra Smooth™ Technology to even out surface porosity, helping to reduce minor surface imperfections and provide a uniform base for texture, suede and other decorative paint finishes. It delivers excellent hiding power, low odour, and low VOC performance, making it suitable for use on plasterboard, textured surfaces and interior masonry. Easy to sand and suitable under both water-based and oil-based topcoats, this sealer undercoat improves paint adhesion and finish quality for a professional result.

This sealer undercoat helps ensure that your final coats go on smoothly and consistently, enhancing coverage and prolonging the life and appearance of your interior paintwork.

Key Features

Surface Preparation & Performance

• Water-based acrylic sealer and undercoat with excellent hiding power.

• Ultra Smooth™ Technology helps minimise surface imperfections before topcoats.

• Low odour and very low VOC formulation — ideal for interior use.

• Seals plasterboard, textured surfaces, interior masonry, and more.

Application & Compatibility

• Easy to sand for a smooth, even topcoat finish.

• Suitable under both water-based and oil-based topcoats.

• Helps hide minor cracks and defects for improved paint coverage.

Benefits

• Improves adhesion and overall performance of subsequent paint coats.

• Enhances uniformity of finish for texture, suede and effect paints.