Industrial grade silica sol 15% content S-515 silica aqueous solution with small particle size of 3-5 nm BC123HILLTAG0S-515 product has the advantages of small particle size, large specific surface area, controllable viscosity, high purity, etc. It is currently widely used in the fields of papermaking retention aid, refractory materials, precision casting, coatings, ceramic polishing liquids, fillers, food packaging materials, etc. TAG1TAG2TAG3TAG4 coating: TAG5S-515 ultra small particle size silica sol can be used in high-end coatings and special coatings. In the same amount of silica sol, the number of colloidal particles and contact points increase sharply, making it have adhesive properties, increasing coating strength and coating properties, and can be applied in high-end coatings and special coatings. TAG6 papermaking: TAG7S-515 ultra small particle size silica sol has the characteristics of large specific surface area and strong reaction activity. It can have good chemical bonding with cationic surfactants and pulp fibers, playing a role in retention and filtration, improving the retention rate of fine fibers and fillers, as well as the dewatering performance of pulp. Using ultra small particle size silica sol as an additive material coated on whiteboard paper can achieve the function of waterproofing the paper. TAG8TAG9TAG10TAG11TAG11TAG12TAG13TAG14TAG15TAG16TAG17TAG18