Achieve a flawless finish in the exact colour you want with this premium water-based primer, now available colour matched to your chosen designer shade. Developed with advanced resin blocking technology, it seals and prevents bleed-through from wood and other exterior surfaces, creating a smooth, clean base.

This high-performance primer offers excellent opacity, outstanding adhesion, and works seamlessly with Johnstone’s Trade Stormshield Aqua Guard Exterior topcoats, enhancing their durability and appearance. With a life expectancy of up to 8 years, it ensures long-lasting performance in all conditions.

A go-to choice for professional decorators and home DIYers, it delivers a solid foundation for any exterior project, in the bespoke colour that matches your style.

Key Product Features

• Features resin blocking technology
• Excellent opacity
• Offers excellent opacity
• Provides a solid foundation for your exterior top coat. 

To get this Johnstone's undercoat in white, shop Johnstone's Stormshield Aqua Guard Exterior Primer Undercoat Brilliant White.