AL-HARD RIGIDIZER HARDENER

(PDF VERSION)

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:

CHARACTERISTICS & PROPERTIES

Color

Opaque White

Composition. %

 

   H20

68-75

   Al203

16-20

   H3PO4

9-12

Specific Gravity, gm/cc

1.2

pH

1.3

Solids Content, %

20

APPLICATION INSTRUCTIONS

(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 100C(212F). 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

Treatment of A Moldable

Dried*

Fired**

Hardened***

Hardened & Fired

Density (pcf)

100

100

105

105

Porosity

40

40

38

38

MOR, psi @ Room Temp.

500

560

1330

665

Compressive Resistance, psi @ 10% deflection

1000

1400

2500

1500

Durometer "D"

50

55

70

70

Pullout Strength, (lbs. on #10 sheet metal screw)

30

50

90

55

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

AVAILABILITY

 

Item # Description
LS01 AL-HARD, 1 Gallon Bucket
LS02 AL-HARD, 55 Gallon Drum

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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