Repair cracks and holes in concrete and tarmac A fast drying super strong dry concrete mix (supplied in 3kg) that can be mixed with water or sealer to form a crack repair paste. For fine cracks the compound can be swept directly into the crack and water or sealer then added to seal the joint. Available in red (select: deep red) or black (select: charcoal) for tarmac repairs plus all the colours featured on the colour chart below. An un-pigmented version is available for pattern imprinted concrete repairs. For further information regarding this product please call 01268 722500 or visit our dedicated Repairing Potholes website.