... shrinkage 3. 9kg JBY-668 Hydrophobic Polyurethane Foaming Agent For Waterproof Product DescriptionSingle-liquid type with simple construction, ... be regulated based on project needs. LocationLeak stoppage for continuous wall in the basement / secondary joints, cracks of ... RC structural, small holes, tunnel, subway, box culvert, wall, etc. UsageDrilling at the water seepage, locking the needle, ...