750ml of Wilko Quick Dry Stain Blocker Paint in White. Wilko Stain Blocker Paint primes and seals both interior and exterior surfaces to stop problem marks and stains showing through after you decorate. Our stain blocker seals many stains including crayon marks, graffiti, water stains, smoke stains and rust.Low VOC content. Water based paint. Keep out of reach of children. Always read instructions. Coverage up to 10square meter.