Shanghai Pujiang new town overseas Chinese investment city wall all used shrimp red stone, using grouting technology construction. Hb-g713 is designated as the only stone material protective agent by the investor in the bidding. It is widely used in the project and the total area is about 100000M2. Green Angel HB-G713 oil penetrant king is a kind of oil stone curing agent, which has excellent anti-alkali effect and can effectively prevent water spots. Party a is in favor of this stone curing agent special features will be specified in the bid.