Images for illustration purposes only Watco Flexible Crack Sealant fills and seals joints or cracks approximately 3mm - 25mm wide in concrete floors. It can be overpainted after 24 hours, but any future movement of the substrate could cause a hairline crack to appear in the paint. Our most appropriate coating for floors liable to slight movement is flexicoat. Recommended areas of use Cracks in concrete or asphalt floors Perimeter seals Trafficable floor joints Features Easy to apply with standard skeleton gun Flexible, moves with substrate (+/-25%) Hardwearing - suitable for areas subject to heavy traffic Excellent adhesion with no primer needed 'Concrete grey' colour - blends in with existing concrete surfaces Rapid cure = tack free in under 4 hours Can be overpainted