GENERAL INFORMATION

ZRCI AL-HARD Rigidizer/Hardener is used to increase the hardness of ZRCI Refractory Sheet products. AL-HARD is comprised of Aluminum Oxide and Phosphoric Acid in a water base. Refractory Sheet products treated with AL-HARD are ready for use after drying. When a chemical bond forms it hardens the fibrous material. The degree of hardening depends on the amount of AL-HARD used. AL-HARD is non-flammable and is not affected by freezing. It can be applied by immersing, spraying, brushing or sponging on many of ZRCI's Refractory Sheet products.

SUGGESTED APPLICATIONS

AL-HARD is used as a strengthening agent for ZRCI Refractory Sheet Products including:

• RS-A MOLDABLE
• RS-CLOTH & RS-TAPE
• RS- MS MOLDABLE SLEEVING

CHARACTERISTICS & PROPERTIES

(On Refractory Sheet Type RS-A Moldable)

ZIRCAR AL-HARD Rigidizer/Hardener can be applied to A Moldable at a rate of up to 1 gallon/ 24in. x 72 in. roll. It can be applied at a lesser rate depending on the degree of hardening desired.

Before applying, dry RS-A Moldable at 100°C(212°F). Apply AL-HARD by immersing, spraying, brushing or sponging it on the surface of the dried product. Allow AL-HARD treated A Moldable to dry.

The following is a summary of the affect of AL-HARD application at a rate of 5% solids pick-up (approximately 1 gallon/roll).

AFFECTS OF AL-HARD APPLICATION ON CHARACTERISTICS & PROPERTIES OF RS TYPE RS-A MOLDABLE

*Dried to constant weight @100°C
**Fired for 1 hour @600°C
***Dried material treated with ZIRCAR AL-HARD @5wt% Pick-up

PRICES ARE SUBJECT TO CHANGE WITHOUT NOTIFICATION AND ARE SUBJECT TO ZIRCAR REFRACTORY COMPOSITES, INC. TERMS AND CONDITIONS. ALL PRICES ARE F.O.B. FLORIDA, NY AND ARE IN U.S. DOLLARS

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ZIRCAR REFRACTORY COMPOSITES, INC.
P.O. BOX 489
FLORIDA, NEW YORK 10921
TEL: 845-651-2200, FAX: 845-651-1515

e-mail: sales@zircarchina.com

This information, which is subject to change, is offered solely for your consideration and should not be taken as a warranty or representation for which we assume legal responsibility. It is not to be understood as permission or recommendation to practice a patented invention without a license and the user should determine whether relevant patents exist.

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