Sina Glass Fiber Delijan began operations in the composites industry 2009, producing fiberglass chopped strand mat with an annual capacity of 6,000 tons in Delijan Industrial Zone. In response to market demand for other fiberglass textiles, the complex's expansion phase added a second chopped-strand-mat production line in 2020, began producing combo mat and stitched mat, and increased the capacity of its other woven fiberglass products. With a total annual capacity of 16,000 tons, the company became Iran's largest manufacturer of fiberglass textiles.

Sina Glass Fiber Delijan is one of the group's most technologically advanced companies, specializing in glass-fiber reinforcement materials for the composites and construction industries. Its materials serve manufacturers requiring lightweight, durable, high-performance composite solutions. The company has been recognized for localizing fiberglass-textile production and for its achievements in industrial innovation.

In addition to supplying Iranian industries, the company exports its products to countries in Asia, Africa, and Europe.

The company is an active member of the Iran Composites Association.