Fiberglass mesh is a neatly woven, crisscross pattern of fiberglass thread that is used to create new products such as tape and filters. When it is used as a filter, it is not uncommon for the manufacturer to spray a PVC coating to make it stronger and last longer. The most common place to find fiberglass mesh is in tape products.
Sheetrock finishers use the mesh frequently. In fact, it is common to replace the paper tape used to float the joint between two pieces of sheetrock. The mesh that sheetrock finishers use comes on a roll just like paper sheetrock tape. The added benefit for the sheetrock finisher is to roll out the mesh over a great distance before having to apply the first coat of joint compound. Not only does it help them in this manner, but it also causes a stronger bond between the joint compound, the tape and the wall.
Sheetrock finisher's also use this tape to patch holes. The most common hole in the sheetrock generally occurs where a doorknob has hit a wall too many times. If it is only slightly damaged, a couple of short pieces of the tape will be formed into a square and placed over the hole. A joint compound will then be applied directly to it. If the hole is too large to patch with fiberglass mesh alone, a piece of metal flashing can be added behind the tape before applying joint compound. Construction work is not the only use for fiberglass mesh.
As a filtering system, fiberglass mesh works really well. As the water flows through it, the mesh catches even the smallest impurities. In addition to this use, it can also be used as a mosquito net.
Finally, fiberglass mesh is sometimes woven into protective clothing used by those who work with dangerous chemicals or firefighters. Tightly woven mesh is put together and shaped into jackets that firemen wear when they are battling a blaze. It protects them from any fire that might ignite their clothing while fighting a fire. Fiberglass mesh can also be used in mold making and as protection against corrosives.
Useful references: Kinds of fiberglass mesh: http://www.fibermesh.net/fiberglass_mesh_eifs_mesh_marble_mesh.html
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