Manta de fibra is a fiber blanket with great insulation properties such as those of ceramic fibers. It is made through a process of picking, heat-shaping, cutting and rolling. Manta de fibra has high quality tensile strength as well as texture uniformity, chemical corrosion resistance, thermal shock stability and low thermal conductivity. It has low density, good resiliency and excellent sound absorbing properties.


Manta de fibra usually appears as an odorless product which can resist extreme temperatures. It is often used as insulation in industrial furnaces or for inner walls that are exposed to or create intense heat. It can replace asbestos, bricks and concrete insulation materials altogether. Manta de fibra products generally contain ceramic fiber and are made in factories with special industrial machines. It comes in different shapes and its aesthetic function is another benefit to using ceramic fibers instead of any other type of insulation material.


Manta de fibra is a ceramic fiber blanket that is finely woven from ceramic fiber yarn. The cloth can be reinforced with fiberglass and steel wire. Manta de fibra can be used for insulation under extreme heat and is utilized for curtains, pipe wrapping and shields. It may also be used in shipyards and refineries.


Similarly to manta de fibra, yeso refractario is appropriate for use in heater construction. The main requirements are the following: high density, large aggregate and high tolerance to thermal shock.


There are several methods of applying el yeso refractario. It can be gunned, rammed or poured. Pouring is the easiest for the studio potter without elaborate equipment. Yeso refractario comes in a coarse aggregate form and is mixed with water. The more water used, the weaker el yeso refractario. The best results come from adding water until the aggregate almost loses suspension and starts to settle. It requires a couple of minutes to mix 50 pounds in a five gallon bucket with the aid of a mixer and an electric drill. Yeso refractario begins to harden in about 30 minutes so that entire sections must be mixed and cast in that period of time to be free of seams.


If yeso refractario breaks down at some point in the future, the present lining can be taken out and another cast in its place. The only disadvantage to using yeso refractario is the extra time required to construct the forms. There are many types of yeso refractario available — ranging from 50% to 95% alumina. The higher the alumina, the higher the cost.  


Yeso refractario is also available for use in arches and doors that can be cast in one piece.


Refractory company engineers are very helpful in calculating the amount of yeso refractario required per job and arch thickness. But, before calling a company for information, the exact dimensions of the proposed construction (including span of arch and arch rise) have to be known.  


Learn more about yeso refractario and find out more about manta de fibra.