Fiberglass is lightweight, strong, and less brittle. One of the most appealing features of fiberglass is that it can be molded into different shapes. This explains why fiberglass is widely used in construction, civil engineering, commercial and residential products, aircraft, roofing, and sporting equipment. There are three varieties of fiberglass, each with its own set of characteristics:

• E-glass that can withstand temperatures of up to 600°C. The electrical

• resistance qualities of e-glass are well-known.

• HR-glass with an 800°C temperature resistance. HR-glass is an aluminosilicate glass that is alkali-free and free of boron oxide and fluorine. In certain ways, this glass might completely replace E-glass. The temperature resistance of this glass up to 800°C is its most essential property.
  

• Glass made of SiO2 with a heat resistance of 1000°C or higher. Fabrics made of high-silica are a new type of heat-resistant textile. Glass fiber products with a high SiO2 content make excellent high-temperature insulators because they may be utilized for long periods without losing their characteristics or melting vaporizing at temperatures of up to 1000oC.

Glass is melted to a molten state and then squeezed through extremely thin holes to make fiberglass. This results in exceedingly thin glass filaments—so light, in fact, that they are best measured in microns. In the late 1930s, this process was used to create the substance that we now know as fiberglass.

These elastic filament threads are suitable for a variety of applications: They can be woven into larger patches of fabric or left unstructured for the more recognizable puffy texture used for insulation or soundproofing.