Waterproof blankets provide a new flexible and eco-friendly solution for seepage prevention.

Waterproof blankets use bentonite as the core seepage-proof material, combined with geotextiles and geonets in a composite weaving process. Relying on the expansion of bentonite upon contact with water to form a dense, waterproof layer, they differ from polymer membrane seepage-proof materials in that they possess unique advantages such as self-healing, flexibility, and eco-friendliness. They are widely used in artificial lakes, riverbank protection, underground garages, and landscaping seepage prevention projects. Traditional rigid seepage-proof layers are constructed with concrete. The rigid structure of concrete is susceptible to cracking due to foundation settlement and temperature shrinkage. Repairing these cracks after leakage is difficult, and the impermeability of concrete hinders water-soil exchange, damaging the surrounding vegetation environment. Geomembrane materials, once punctured, allow leakage to continue to spread from the damaged point, lacking self-repairing capabilities.

Waterproof blankets encapsulate high-density sodium-based bentonite particles. Upon contact with water, the bentonite absorbs water and expands dozens of times, forming a waterproof gel layer. When a tiny puncture occurs in the blanket, water seepage triggers the surrounding bentonite to expand continuously, automatically sealing the crack and achieving self-healing. This significantly reduces the cost of subsequent leak repair and maintenance. The blanket features a flexible woven structure that conforms to uneven substrates and adapts to varying soil settlement. Unlike concrete, it won't crack, and installation doesn't require perfectly leveling the substrate. Small amounts of gravel and soil clods won't affect the overall seepage prevention effect. The simplified substrate pretreatment process shortens the construction cycle.

Ecological compatibility is a core competitive advantage. Bentonite is a natural inorganic mineral, free of chemical pollution, and releases no harmful substances upon contact with water or soil. The gel layer has micro-permeable pores, allowing for trace water-soil exchange, and enabling the normal growth of surrounding aquatic plant roots, thus balancing seepage prevention with natural ecological cycles. After laying in river channels and wetland projects, it can be directly covered with soil for planting aquatic vegetation, forming an integrated structure of seepage prevention and green landscape. In underground construction and utility tunnel projects, it isolates groundwater infiltration without disrupting the underground soil ecological balance.

Construction is convenient; the roll material can be freely cut and spliced, and the bentonite naturally integrates after watering the overlapping areas. No professional welding equipment is required, and small projects can be completed by a single person. Heavy-duty seepage prevention projects can be completed with simple fixing components, significantly reducing the investment in professional equipment compared to membrane materials and concrete. The industry continues to optimize the product structure of waterproof blankets. Thickened, high-expansion versions are suitable for seepage prevention in high-water reservoir areas, while thin and economical versions are suitable for small water features in gardens. Reinforced versions improve tensile strength and are suitable for steep slopes. As the scale of ecological landscape and underground infrastructure projects continues to expand, the market demand for waterproof blankets with self-healing capabilities and ecological properties is steadily increasing. Flexible seepage prevention systems are gradually replacing traditional rigid seepage prevention processes, driving water and soil seepage prevention projects towards a new model of ecological, simplified, and long-term operation and maintenance.