This 10–year exterior primer undercoat is designed for long–lasting durability on demanding outdoor projects, giving homeowners, facilities managers and trade professionals a dependable base that stands up to the weather. The advanced technology formula is engineered for superior exterior performance, forming a tough, resilient foundation that supports your chosen topcoat and helps it look better for longer. Dark grey colour delivers a strong, neutral base for a wide range of topcoats, helping deep or bold shades achieve rich, even coverage while reducing the risk of patchiness. With multi–surface application suitable for various exterior substrates, a single 750ml tin can be used across different areas of the same project, simplifying preparation and reducing downtime. Quick–drying performance helps speed up project completion times, so you can prime, undercoat and move on to finishing coats without days of waiting. The flexible formulation creates a tough, resilient foundation that resists everyday movement and stress, helping to minimise cracking, peeling and flaking as conditions change. Developed by Sandtex, a dedicated exterior specialist brand with over 60 years of expertise in protecting buildings, it delivers reliable, professional–grade results for anyone serious about long–term exterior protection.
- Up to 10–year durable exterior protection
- Advanced formula for harsh weather resistance
- Dark grey base optimises topcoat coverage
- Multi–surface use across exterior substrates
- Quick–drying, flexible, stress–resistant film
Ideal for doors, fascias, window surrounds and exterior detail work, this exterior primer undercoat creates a consistent base that helps topcoats adhere strongly and perform as specified. The dark grey tone is especially effective beneath deep or vivid colours, supporting better hiding power and a smoother final finish. Multi–surface application means you can handle different exterior substrates in one system, reducing the need for multiple specialist primers. Combined with quick–drying performance and a flexible formulation that resists everyday movement and stress, it is well suited to exposed elevations and busy environments where durability matters. Backed by a heritage of more than six decades in exterior protection, it offers a practical route to up to 10 years of durable protection against the elements.
