I need in 5 description 500 char in this keyword: pu injection grouting2 / 2Here are 5 distinct descriptions for PU injection grouting (polyurethane injection grouting), each around 400–500 characters, suitable for marketing, proposals, or website use in construction/waterproofing: PU injection grouting is a highly effective waterproofing technique that injects expanding polyuretha... https://shakuraconstruction.sg/waterproofing-contractor-singapore/