Fiberglass mesh typically consists of fiberglass strands woven together to form a mesh fabric. The "45 gsm" you mentioned refers to the weight of the mesh in grams per square meter. This indicates how much the material weighs per unit area.GSM stands for grams per square meter, and it's a common measurement used to describe the weight or density of fabrics and other materials. In the case of fiberglass mesh, a 45 gsm weight suggests that the me ... Continue