Zircar Zirconia, Inc.
“Manufacturer of the original ZIRCAR products” ©

ZIRCONIA CEMENTTYPE ZR-CEMFEATURES• High Temperature Stability to 2200°C• Withstands Water and Steam aftercuring• Safe to Use – Non-Flammable• Excellent Thermal Shock Resistance• Low Shrinkage, High Strength• Available ‘Off the Shelf’• Single Part System
Zirconia Cement Type ZR-CEM.

Zircar Zirconia Cement Type ZR-CEM is an off white single part yttria-stabilized zirconia
adhesive with a useful temperature limit of 2200°C. ZR-CEM is formulated specifically forbonding Zircar Zirconia Felts, Boards and Cylinders to themselves or to back-up thermal
insulations such as porous firebrick, alumina fiber and alumino-silicate fiber boards. ZRCEM is composed of yttria-stabilized zirconia milled fibers and sub-micron particles. Potassium silicate and zirconium acetate binders are added to enhance bonding characteristics. ZR-CEM will not bond to non-porous surfaces such as glass or steel. ZR-CEM ismildly acidic (pH 5.4) and forms a strong bond upon removal of the water solvent.
For most furnace applications, the articles bonded together are ready for placing in service
once the cement has dried. Curing at 426°C (800°F) or more may be desirable to eliminate the acetate prior to use. The cured bond joint is stronger than the tensile strength of
30 pound per cubic foot density Zircar Zirconia insulation material Types ZYFB-3, ZYZ-3and ZYC. Pull out or de-lamination due to excessive mechanical or thermal stresses willusually first occur in the insulation material itself.
ZR-CEM has the consistency of a thick paint and should be mixed thoroughly before using.
ZR-CEM may be applied by dipping, brushing, or rolling. If ZR-CEM becomes thickened
by evaporation, de-ionized or distilled water can be used to bring the cement back to its
original consistency. ZR-CEM is non-flammable and is not affected by freezing. For a0.01 inch thick bond, a pint of cement will cover about 7 square feet of joint surface.

Zircar Zirconia, Inc.
PO Box 287
Florida, NY 10921-0287
USA

Tel: 845-651-3040
Fax: 845-651-0074
email: sales@zircarzirconia.com
web: www.zircarzirconia.com

Product Data
Bulletin #B-AJanuary 2004
Page 1 of 3

Zircar Zirconia, Inc.
“Manufacturer of the original ZIRCAR products” ©

ZIRCONIA CEMENTTYPE ZR-CEM
APPLICATION INFORMATION•••ZR-CEM is used for bonding zirconia fibrous ceramic materials together and to otherporous surfaces.
ZR-CEM is used for forming rigid tubes, setter trays and other shapes by bonding offibrous ceramic materials.
ZR-CEM is used for repairing cracks and openings in furnace walls composed of zirconia fibrous ceramic material.

DIRECTIONS FOR USE
Bonding Closely Mated Surfaces
1. Mix contents thoroughly before using.
2. Clean surfaces to be joined making certain they are free of oil, starch, etc.
3. Pre-moisten both surfaces with de-ionized water from a spray bottle (~1 cc/in2).
4. Thoroughly coat both cleaned surfaces to be joined with ZR-CEM using a brush,
spatula or trowel. Reapply ZR-CEM as required until both surfaces remain wet andfluid. Initially, some wicking into porous materials will occur.
5. Contact wet surfaces using slight pressure to assure match of parts.
6. Dry the joined pieces thoroughly before moving or placing into service. The time required to dry varies from a few minutes to a day or more, depending on the size ofthe part and humidity. Drying may be accelerated by heating or oven drying at not
greater than 90°C (200°F).
7. Complete the curing of the bond by firing to a minimum of 426°C (800°F). In mostcases this curing can be accomplished in the initial heating cycle.
Filling Holes or Bonding Mismatched Surfaces Greater than 1/16 Inch
1. Make a thick paste by mixing one fluid ounce (about 30 cc) of ZR-CEM with 6 gramsof lightly crushed zirconia board, felt or bulk fiber.
2. Spread the paste into the void using a spatula or trowel.
3. Dry and cure at a somewhat slower rate than outlined above.
Surface Coating or Hardening of Fibrous Zirconia Materials
1. Thin ZR-CEM slightly with water to allow deeper penetration of the surface.
2. Clean surfaces to be coated making certain they are free of oil, starch, etc.
3. Apply the thinned ZR-CEM onto the area to be coated using a brush or sponge. Donot apply thicker than 0.01 inch or the surface coating may crack.
4. Air or oven dry at not greater than 90°C (200°F) and cure at 426°C (800°F) as recommended above.
Zircar Zirconia, Inc.
PO Box 287
Florida, NY 10921-0287
USA

Tel: 845-651-3040
Fax: 845-651-0074
email: sales@zircarzirconia.com
web: www.zircarzirconia.com

Product Data
Bulletin #B-A
January 2004
Page 2 of 3

Zircar Zirconia, Inc.
“Manufacturer of the original ZIRCAR products” ©

ZIRCONIA CEMENTTYPE ZR-CEM
PROPERTIES & CHARACTERISTICS
Fired Composition - Wt%
ZrO2 *

85

Y2O3

10

SiO2

3.6

K2O

1.2

Trace Inorganics<0.3

Melting Point, ºC (ºF)

2430 (4406)

Continuous Maximum Use Temperature**, ºC (ºF)

2200 (3992)

Bulk Density after drying, g/cc (pcf)

3.1 (195)

Bulk Density as supplied, g/cc (pcf)

2.0 (125)

Solids Content, Wt%

60

Weight Per Pint, grams (lbs)953 (2.1)

Viscosity, centipoises at 25°C (77°F)

1200* 1 - 2 wt% hafnia occurs naturally with zirconia and does not affect performance.
** Maximum use temperature is dependent on variables such as thermal and mechanical stresses, and thechemical environment that the material experiences.

ORDERING INFORMATION
Zirconia cement is available in a standard pint size. Please Contact our Sales Department for pricing and availability.
Standard Size

Item Number

ZR-CEM, 1 pint

BA001

Zircar Zirconia, Inc.
PO Box 287
Florida, NY 10921-0287
USA

Tel: 845-651-3040
Fax: 845-651-0074
email: sales@zircarzirconia.com
web: www.zircarzirconia.com

Product Data
Bulletin #B-A
January 2004
Page 3 of 3