- Colour: White
- Size: 750ml
- Coverage(per litre): 13sq m
- Coverage per tin: 9.75sq m
- Effects and finish: Undercoat
- Number of coats recommended: 2
- Interior exterior usage: Suitable for interior use
- Additional information: Ronseal Knot Block Primer & Undercoat prepares bare and previously painted interior wood for painting. It is the only wood primer guaranteed to permanently stop knots from showing through your top coat. Guaranteed to permanently block wood knots. Type: Primer and undercoat.