The content of a 45 gsm (grams per square meter) fiberglass mesh can vary slightly depending on the specific manufacturer and intended use, but generally, it will consist of the following components:
1. **Fiberglass Yarns or Threads**: The primary component of the mesh is fiberglass yarns or threads. These are typically made from glass fibers, which provide the mesh with its strength and durability. The thickness and density of the yarns may vary depending on the desired properties of the mesh.
2. **Resin Coating**: Fiberglass mesh is often coated with a resin to improve its stability and weather resistance. The resin coating helps to protect the fiberglass fibers from damage caused by exposure to moisture, chemicals, and UV radiation. The type of resin used can vary but commonly includes epoxy, polyester, or vinyl ester.
3. **Additives**: Depending on the specific requirements of the application, the fiberglass mesh may contain additives to enhance its performance. These additives can include UV stabilizers to prevent degradation from sunlight exposure, flame retardants for fire resistance, anti-static agents to reduce static electricity buildup, and colorants for aesthetic purposes.
Overall, a 45 gsm fiberglass mesh will typically consist of fiberglass yarns or threads coated with a resin and may contain various additives to meet specific performance requirements. This lightweight mesh is commonly used in applications such as reinforcing plaster, stucco, and concrete, as well as in wall insulation and other construction projects where strength and durability are needed.