The so-called soft and hard is actually a kind of elasticity. For example, aluminum and iron, intuitive touch surfaces, are stiff, cold and very hard. But iron is easy to break, and aluminum has good toughness, which can straighten Bai Wan and will not break easily. Speaking of beauty lotion, it's exactly the same. Too hard sewing agent is too brittle, and it is easy to expand with heat and contract with cold. If the weather is hot, it may arch or even damage the tiles; It may be bad when the weather is cold. So in this respect, the soft ones must be more tough and durable.
Want to know more about the beautiful sewing agent, recommend consulting Keshun family waterproof. Keshun family waterproofing covers the national market through dealer channels, e-commerce channels and home improvement channels. To provide one-stop home improvement accessories solutions for thousands of households and protect consumers' good life; Keshun family waterproof is a high-end brand specializing in the research, development, production and sales of home improvement auxiliary materials, and its professionalism is trustworthy. View future waterproof market bonus