The waterproof mechanism of silicone coating is mainly based on its special molecular structure and physical and chemical effects. Its application in the construction field is becoming more and more extensive due to its high efficiency and environmental protection. The following is an analysis based on scientific principles and practical applications:

1. Waterproof mechanism: triple protection
‌ Hydrophobic film formation ‌
Silicon molecules (such as silane and siloxane) are oriented on the surface of the substrate to reduce surface tension and form a nano-scale hydrophobic film. This film increases the contact angle of water droplets to more than 110°, rolling and sliding in a "lotus effect" to prevent water infiltration. ‌
‌ Deep penetration and pore blocking ‌
Small molecule silicone penetrates into concrete or masonry through capillary action (depth up to 0.3mm), reacts with active substances (such as hydroxyl groups) in the substrate to form hydrophobic silicone resin, permanently blocking microcracks and pores. ‌

‌Breathability guarantee‌
The generated mesh siloxane structure only blocks liquid water, allowing water vapor to pass freely, avoiding problems such as hollowing and falling off caused by internal moisture accumulation.

2. Core application scenarios in the construction field
‌Conventional building waterproofing
‌Roof/exterior wall: resist ultraviolet rays, thermal expansion and contraction deformation, and extend service life;
‌Bathroom/basement: direct construction on wet base surface, resist hydrostatic pressure penetration;
‌Renovation project: cold construction characteristics avoid demolition of old base surface and reduce maintenance costs.
‌Ancient building protection ‌
Permeable silicone waterproofing agent can repair cracks in bricks and tiles, while maintaining the air permeability of the wall, preventing salt precipitation and weathering, and is suitable for wooden structures, stone tablets and other cultural relics.

‌Infrastructure protection ‌
Bridges and tunnels: resist freeze-thaw cycles and chemical corrosion;
Hydraulic engineering: improve the impermeability of dam concrete and withstand high water pressure.