Weifang Longstar economy and trading Co.,ltd is a high-tech modern private enterprise integrating R&D, production and sales of high-quality silicon materials. Our main products are: sodium silicate, potassium silicate, silica, APSM and so on. The products sell well in the domestic market and are exported to Japan, South Korea, Southeast Asia, Central and South America, Africa and other markets. With excellent quality, reasonable price and excellent service, Longstar has won praises from customers all the time...