... . Non-toxicity after the reaction JBY-669 Hydrophilic PU Foaming waterproofing Product Features1.When going through water, it will ... with low catalyst. You can regulate the speed of foaming according to requirements of construction to leak stoppage. Besides, ... , crack, diaphragm wall, box culvert, hair crack, roof, etc. Ground improvement Test report Test itemStandardTest resultDensity1.00 g/cm³+1 ...