Ronseal White Knot Block Wood Primer & Undercoat prevents wood knots and resins from showing through, while covering bold colours and dark marks to help paint adhere.

Suitable for bare or previously painted wood, it provides a smooth, durable finish that resists yellowing, cracking and peeling. Ready to paint over in 4 hours, it covers up to 12m² per litre and is ideal for knotty timber such as pine.

• For knotty wood, including pine
• Completely blocks wood knots and resins
• Suitable for bare or previously painted wood
• Covers bold colours and dark marks
• Helps paint adhere for a flawless finish
• Won’t yellow, crack or peel
• Ready to paint over in 4 hours
• Covers up to 12m² per litre