Colorfill Walnut Worktop sealant & repairer 20ml. This Color Fill walnut 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 & top of the exposed core taking care to ensure adequate sealant around the front & back edges & bolt slots. quickly close the joint & allow excess sealant to squeeze out of the joint align the two sides & 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 & 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.