This ColorFill black polymer resin joint sealant & repairer is ideal use 1 tube of colorfill per joint. apply a thick bead of colorfill around the leading edge of the joint to both the bottom and top of the exposed core taking care to ensure adequate sealant around the front and back edges and bolt slots. quickly close the joint and allow excess sealant to squeeze out of the joint, align the two sides and tighten the bolts fully. excess sealant should be removed with a spatula which should be drawn towards the front edge from the back of the worktop applying pressure down and into the joint ensuring there are no air holes along the top of the joint. clean off the remaining surplus sealant with a solvent moistened tissue taking care not to dislodge any colorfill still setting in the joint.. Once cured, the joint is completely waterproof.