Ronseal Knot Block Primer & Undercoat - 250ml
Professional knot-blocking primer & undercoat for interior wood. Prevents bleed-through for perfect finishes. 750ml size.
The Ronseal Knot Block Primer & Undercoat is a high-quality preparatory coating designed to seal wood surfaces and provide the perfect base for top coats. This professional-grade formulation effectively blocks knots, resinous areas and other imperfections in wood, preventing bleed-through and ensuring a smooth, even finish for your painting projects.
Specially developed for interior wood surfaces, this primer undercoat combination improves adhesion and coverage of your final top coat. It dries to a white base that helps achieve true colour representation with your chosen decorative finish.
Key Benefits:
- Blocks knots and resinous areas effectively
- Seals porous surfaces for improved top coat adhesion
- Dries to a white finish for accurate colour reproduction
- Low odour formulation suitable for interior use
- Quick drying time allows for faster project completion
Ideal for use on doors, skirting boards, window frames and other interior woodwork. For best results, apply with a brush or roller, allowing sufficient drying time between coats. The durable formulation ensures long-lasting protection and prepares surfaces perfectly for your chosen top coat.
Variant Details
- Size: 250ml
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Always follow local regulations and product guidance. Use appropriate PPE.
Free standard delivery on UK mainland orders. Express delivery options and international shipping available at checkout.
We offer a 30-day money-back guarantee on most products. For faulty items, contact us within 14 days for a replacement or refund.
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