Waterproof silica gel appearance is white spherical particles, with high microporous structure, acid, alkali and solvent resistance. Good thermal stability. Non-toxic and odorless. It has high water resistance and adsorbability. High compressive strength, long service life, low regeneration rate is better than other desiccant. Air separation resistant silica gel, also known as water-resistant silica gel. Common silica gel has open porous structure, large specific surface area, can adsorb a variety of substances, is a good desiccant, adsorbent and catalyst carrier. However, it is easy to crack in water, which makes the particle integrity decrease and affects the normal process. Good thermal stability. Non-toxic and odorless. It has the advantages of high water resistance, adsorption, high compressive strength, long service life, low regeneration and crushing rate. FNG water resistant silica gel is mainly used for air drying in the process of air separation, liquid air, liquid oxygen preparation process of acetylene adsorption, compressed air and various industrial gas drying, in the petrochemical industry, electrical industry, brewing and other industries do liquid adsorbent and used as a catalyst support, used in water treatment for water purification.