Abstract: A finishing composition and method for applying the composition to a fabric woven from glass fibers or from a blend of glass fibers and other fibers such as polyamide or polyester. Such finishes significantly enhance the flex life of woven glass fabrics by improving the acid and alkali corrosion resistance of the fibers. The finish, which employs fluoropolymer and epoxy resin, can be loaded into the fabric in multiple baths. Filtration products can be fabricated from the finished fabrics and they are especially useful for making filter bags used in the bag houses for central power generating stations and similar industries.