With economic development and societal progress, the requirements for building waterproofing materials are becoming increasingly stringent, leading to the emergence of various forms of waterproof membranes. However, underground waterproofing, due to its unique geographical location and other special characteristics, has specific performance requirements for waterproofing materials. Underground engineering waterproof membrane layers are formed by continuously bonding various membranes to the structural surface using asphalt adhesive.

    Underground waterproofing membranes require high-performance membranes with good toughness and flexibility to accommodate minor deformations caused by subsidence and expansion in underground engineering projects. They must also be resistant to corrosion from acids, alkalis, and salt solutions, or to vibrations. However, construction presents challenges such as difficulty in ensuring quality, poor working conditions, air pollution, and safety concerns. In particular, construction quality is difficult to inspect, and repairs are challenging once leaks occur.

    The advent of self-adhesive waterproof membranes has greatly reduced the difficulty of waterproof membrane construction. In particular, polymer waterproof membranes have been widely used in the building waterproofing industry in recent years due to their performance advantages. However, the polymer self-adhesive waterproof membranes currently sold on the market still have many drawbacks, such as poor seepage prevention, serious water seepage and leakage, poor resistance to damage, and easy puncture or tearing.

    Damage to the waterproofing system requires significant manpower and resources for repair, shortens the lifespan of the waterproofing membrane, and wastes funds and resources. This is especially true for mountainous areas and underwater tunnels, where there is constant water pressure and severe impact from natural environmental factors, thus placing even stricter demands on the performance of waterproofing materials.