Ronseal Knot Block Primer and Undercoat permanently blocks wood knots bleeding through the paint surface. It gives a flawless finish that won't yellow. This paint prepares bare and previously painted interior wood for top coat paints and covers bold colours, dark marks and helps paint to stick. It won’t yellow, crack or peel and will be ready to paint over in as little as four hours.

Key features:

• 2.5L
• White
• Guaranteed to block wood knots
• Can be used on bare wood or previously painted
• 2 in 1 blocks and primes
• Won’t yellow, crack or peel