一种用于水工建筑物的新型密封止水材料——弹性聚氨确密封膏已经问世,它是聚氨酯合成材料中一种比较新的产品。它既具有塑料的高强度,又具有橡胶的高弹性,具有强度高、伸长率大、硬度范围广; A new type of sealing and water-stop material used in hydraulic structures - Elastic Polyurethane Sealant has come out. It is a relatively new product in polyurethane composite materials. It not only has high strength plastic, but also has a high elasticity of rubber, with high strength, elongation, a wide range of hardness;