Sauereisen - Model No. 12 - Electric Insulating Cement
From Corrosion Protection - Air-Setting Adhesives Products
Sauereisen Electric Insulating Cement No. 12 is an inorganic cement used for applications requiring high dielectric strength and volume resistivity through 2200oF. No. 12 offers low shrinkage and coefficient of thermal expansion making it an excellent cement for bonding or potting high-alumina ceramics.
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Characteristics
- High dielectric strength
- Heat conductive and thermal shock resistant
- Resists temperatures t2200oF (1204oC).
- Oil and solvent resistant
- Specialty developed for potting and encapsulation.
- Excellent bond strength
- Extremely hard surface upon seting/ excellent abrasion resistance.
- Chemically setting at room temperature.
- Odorless
Mixing/Application
Sauereisen No. 12 is a two-part, chemical-setting cement consisting of a Powder and Liquid which are mixed together as used. No. 12 Powder should be thoroughly remixed before using. Weight out 75% of No. 12 Powder and 25% of No. 12 Liquid. Place Liquid in a clean mixing container and gradually add Powder while mixing. Continue mixing until a smooth, uniform consistency is obtained. Mixing may be done with a slow-speed mixer or by hand with a spatula.
No. 12 may be mixed to a thinner consistency by regulating the amount of Liquid used; however, the use of excess Liquid will reduce mechanical strength, increase shrinkage and delay set time.
Failure of the cement to adhere indicates that setting has begun - discard cement. Do not attempt to retemper by adding more Liquid. Porous substrates may require dampening with No. 12 Liquid before applying the mixed cement.
Setting/Curing
No. 12 hardens with an internal chemicalsetting action in 18-24 hours at ambient temperatures. Working time of No. 12 when Powder and Liquid are blended together is approximately 30 minutes at 70oF. If it is desired to accelerate the cure, oven drying at 180oF can be used. Avoid steaming while drying. If the cement will be exposed to elevated temperatures, contact Sauereisen for appropriate drying schedule recommendations.
If high humidity resistance is required and it is impractical to fire cement, a moistureresistant lacquer or silicone coating should be applied to the exposed surfaces.
Packaging
- Liquid: 1-qt. and 1-gal. cans; 50-lb. pails; 600-lb. drums
- Powder: 1-qt. and 1-gal. cans; 50-lb. bags
Clean-Up
All equipment should be cleaned with soap and water before No. 12 cures. If removal is required after the cure, consult Sauereisen for recommendations.
Shelf Life
Sauereisen Electric Insulating Cement No. 12 Powder and Liquid have a shelf life of one (1) year when stored in unopened, tightly sealed containers in a dry location at 70oF. If there is a doubt as to the quality of the material, consult Sauereisen.
Physical Properties
- Coefficient of thermal expansion (ASTM C372) 3.1: x 10-6 in/irV°F (5.58 x lO-6cm/cm/°C)
- Color: Off White
- Compressive strength (ASTM C579): 4000 psi (281 kg/cm2)
- Density (ASTM C20): 180 pcf (2.88 qrn/cm3)
- Dielectric Strength (ASTM D149): 76-80 Volts/mil
- Maximum service temperature: 2200°F(1204°C)
- Modulus of rupture (ASTM C580): 510psi(35ko/cm2J
- Shrinkage: ^0.8%
- Tensile strenath (ASTM C307): 290 Dsi (20 kn/cm2)
- Thermal conductivity 9.8 - 7.3 Btu-: in/ft2-hr-o F3.3• 2.46 >:10-3Cal-cnVcm2-sec-oC)
- Volume Resistivity (ASTM D1829): 10Ai 010
Physical Properties
- Coefficient of thermal expansion (ASTM C372) 3.1: x 10-8 in/in/°F (5.58 x lO-6cm/cm/°C)
- Color: Off White
- Compressive strength (ASTM C579): 4000 psi (281 kg/cm2)
- Density (ASTM C20): 180 pcf (2.88 gm/cm3)
- Dielectric Strength (ASTM D149): 76-80 Volts/mil
- Maximum service temperature: 2200°F(1204°C)
- Modulus of rupture (ASTM C580): 510psi(35kg/cm2J
- Shrinkage: less than 0.8%
- Tensile strenath (ASTM C307): 290 Dsi (20 kg/cm2)
- Thermal conductivity 9.8 - 7.3 Btu.in/ft2-hr-°F 3.3• 2.46 >:10-3Cal-cm/cm2-sec-°C)
- Volume Resistivity (ASTM D1829): 108 -1010
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