Sandtex 10 Year Exterior Primer Undercoat 750ml
The Sandtex 10 Year Exterior Primer Undercoat in both Dark Grey and White is a high-performance water-based exterior paint preparation product designed to offer outstanding adhesion, long-lasting durability, and protection against the elements. It acts as both a primer and undercoat, simplifying exterior painting projects by eliminating the need for multiple products.
Ideal for use on a variety of surfaces, this product forms a tough, flexible base coat that resists cracking and flaking over time. It is a critical part of the Sandtex 10 Year Exterior system, ensuring maximum lifespan and finish quality when followed with a compatible Sandtex topcoat.
Key Features:
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10-Year Durable Protection
Provides a long-lasting barrier that protects surfaces for up to 10 years when used as part of a complete exterior paint system. -
Multi-Surface Compatibility
Suitable for use on wood, metal, masonry, and other exterior surfaces. -
2-in-1 Primer and Undercoat
Simplifies the painting process by combining surface sealing and base colour preparation in one application. -
Quick Drying Water-Based Formula
Touch dry in just 1–2 hours, allowing for faster project turnaround and less downtime between coats. -
Flexible Formulation
Resists the natural expansion and contraction of surfaces to prevent cracking, flaking, or peeling. -
Mould and Mildew Resistant
Offers added protection against fungal growth, keeping surfaces looking clean and fresh. -
Low VOC Content
Minimal environmental impact and reduced odour compared to traditional solvent-based products. -
Smooth Satin Finish
Creates a professional-quality, low-sheen base for topcoats to adhere to.
Colour Variants:
- White: Perfect for bright, light-toned finishes or to serve as a neutral base.
- Dark Grey: Ideal under darker topcoats or to achieve a contemporary, deep-toned base.
Recommended Uses:
- Exterior woodwork (doors, windows, fascia boards)
- Metal railings, gates, and outdoor furniture
- Masonry and render preparation
- General outdoor DIY projects
Application Guidelines:
- Preparation: Ensure surfaces are clean, dry, and free from dust or grease. Sand down rough surfaces and remove loose paint.
- Application: Stir thoroughly before use. Apply using a quality synthetic brush or roller.
- Drying Time: Touch dry in 1–2 hours. Allow 4–6 hours between coats if a second is needed.
- Coverage: Approximately 12–14m² per litre, depending on surface porosity and texture.
- Clean-Up: Clean brushes and equipment with warm soapy water immediately after use.
Frequently Asked Questions (FAQ):
Q: Can I use this undercoat with any brand of topcoat?
A: While this undercoat is compatible with most water-based and solvent-based topcoats, it is specifically formulated to work optimally with Sandtex exterior paints.
Q: Is sanding required between coats?
A: For the smoothest finish, a light sand between coats is recommended but not always necessary.
Q: Can it be used indoors?
A: It is formulated for exterior use, but can technically be used indoors where a tough, weather-resistant base is needed.
Q: Does it require a separate primer?
A: No. This is a self-priming undercoat, meaning no additional primer is needed on most surfaces.
Warranty & Guarantee:
This product is part of Sandtex’s 10-Year Protection system. When used according to manufacturer guidelines and with compatible topcoats, it is guaranteed to deliver long-lasting protection for up to 10 years. Proof of purchase and proper usage may be required for any warranty claims.