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Glass fibers constitute the major proportion (> 95%) in reinforced plastics. They are inexpensive, possesses low density, chemicals resistant, offers good insulation, easy to process with high strength/stiffness than the plastics with which they are reinforced [3]. However, they are more likely to breakage under high tensile stress for a prolonged duration. Other factors affecting the strength of glass fibers include temperature, moisture and period of loading. However, the facile fabrication processes (die-moulding and filament winding) make them a material of choice in various applications. Commercially, glass fibers are available in the form of continuous and chopped filaments, cloth, mates, roving, tapes, and yarns. The further addition of chemicals to silica sand while making glass can also yield different types of glasses.