硅酸钠（水玻璃）
【中文】耐热性好，高温下水玻璃不燃烧、强烈干燥强度不降低，可用于配制耐热砂浆、耐热胶泥；耐酸性好，能经受多种无机酸和有机酸作用，用于配置耐酸材料；粘结性好，水玻璃硬化时析出硅酸凝胶，粘结能力强，能堵塞毛细孔隙、防止水渗透。使用时一般加入12%-15%的氟硅酸钠作为固化剂，以加快凝结固化速度并提高固化强度。
【English】It has good heat resistance: at high temperature the water glass does not burn and its strength does not decrease after intense drying, so it can be used to prepare heat-resistant mortar and heat-resistant cement. It also has good acid resistance and can withstand many inorganic and organic acids, making it suitable for acid-resistant materials. With strong adhesion, it precipitates silicic acid gel upon hardening, which can block capillary pores and prevent water penetration. Sodium fluorosilicate (12%-15%) is generally added as a curing agent to accelerate setting and hardening and improve cured strength.
