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Johnstone’s Trade Aqua Water Based Undercoat Brilliant White 2.5L is a high-performance basecoat designed to work seamlessly within modern water-based decorating systems. Offering excellent adhesion, strong opacity and quick drying times, it provides a smooth, durable foundation for Aqua gloss and satin finishes.
The 2.5 litre size is ideal for medium-sized decorating jobs, including doors, trim and larger timber surfaces.
Water-based professional undercoat
Colour: Brilliant White
Size: 2.5 Litres
Suitable for interior and exterior use
Quick drying formulation
Low odour and lower VOC than traditional solvent systems
Excellent covering power
Compatible with Johnstone’s Trade Aqua gloss and satin topcoats
Formulated to complement the Johnstone’s Trade Aqua range, this undercoat promotes faster project turnaround thanks to its reduced drying times. It delivers a durable, well-sealed base that enhances the appearance and longevity of water-based finishing coats.
Its low odour properties make it particularly suitable for use in occupied properties such as homes, schools and offices.
The high-opacity formula helps achieve uniform coverage while reducing the impact of previous colours. It levels well during application, creating a stable surface that supports a high-quality final finish.
Recommended for use on:
Interior doors and frames
Skirting boards and architraves
Window frames
Interior and exterior timber
Appropriately primed metal surfaces
For bare substrates, ensure a suitable primer is applied before undercoating.
Apply to clean, dry and properly prepared surfaces using a synthetic brush or suitable roller. Stir thoroughly before use. Allow sufficient drying time before applying the selected Aqua gloss or satin topcoat.
For decorators seeking a durable, fast-drying undercoat with reduced odour and strong performance, this 2.5L pack provides an efficient solution. It supports smooth application and long-lasting results as part of a professional water-based decorating system
