Sauereisen - Model No. 31 -White and Porcelain-like Cement

• Adheres to practically all surfaces that are clean and free of oil and grease.
• Resists oil. electricity and most solvents.
• Heat conductive and thermal shock resistant.
• Resists all acids (except hydrofluoric).
• Fireproof and gasproof.
• Resists temperatures to 1750°F (954°C)

Mixing

Sauereisen No. 31 is a two-part, chemical-setting cement consisting of a Powder and Liquid which are mixed together as used. No. 31 Powder should be thoroughly remixed before using. Weigh out 2 parts of No. 31 Powder and 1 part of No. 31 Liquid (2 : 1), by weight. 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. 31 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.

Surfaces to receive the cement should be clean and free of grease and dirt. Highly porous substrates can be dampened slightly with Sauereisen Thinning Liquid No. 14. Priming in this manner will assist the natural anti-cavitational property of the cement and may not be necessary in all applications.

Cement No. 31 may be placed by brushing, pouring or other automatic dispensing methods.

Sauereisen No. 31 is a two-part, chemical-setting cement consisting of a Powder and Liquid Binder which are mixed together as used. No. 31 Powder should be thoroughly remixed before using.

Since the cement sets by a chemical process that occurs when the No. 31 Binder reacts with the No. 31 Powder, there are no maximum thickness restrictions for application.

• Absorption: 13.8%
• Bond strength: 200 psi (14 kg.cm2)
• Coefficient of thermal expansion (ASTM C372):
• 6.2 x 10-6 in/in/o F
• (1.12 x 10-5 cm/cm/oC)
• Color: Off white
• Compressive strength (ASTM C579): 2200 psi (154 kg/cm2)
• Density (ASTM C20): 121 pcf (1.94 gm/cm3)
• Dielectric constant (ASTM D150): 5.0 - 7.0
• Dielectric strength (ASTM D149)
• at 70oF (21oC): 12.5 to 38.0 Volts/mil (490 to 1490 Volts/mm)
• at 750oF (399oC): 12.5 to 38.0 Volts/mil (490 to 1490 Volts/mm)
• at 1475oF (801oC): less than 2.0 Volts/mil (78 Volts/mm)
• Flexural strength (ASTM C580): 455 psi (31 kg/cm2)
• Linear shrinkage: 0.004 in/in (0.004 cm/cm)
• Maximum service temperature: 1750oF (954oC)
• Shear strength: 430 psi (30 kg/cm2)
• Tensile strength (ASTM C307): 400 psi (28 kg/cm2)
• Volume resistivity (ASTM D1829)
• at 70oF (21oC): 109 - 1011 ohm-cm
• at 750oF (399oC): 107 - 108 ohm-cm
• at 1475oF (801oC): 102 - 103 ohm-cm

No. 31 hardens with an internal chemicalsetting action in 18-24 hours at ambient temperatures. Working time of No. 31, 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.

Powder:

• 1-qt. and 1-gal cans;
• 50-lb. moisture-resistant bags, and a 50-lb. plactic pail

Liquid

• 1-qt. and 1-gal. cans;
• 50-lb. pails; 600-lb. drums.

All equipment should be cleaned with soap and water before No. 31 cures. If removal is required after cure, consult Sauereisen.

No. 31 Powder and Liquid have a shelf life of one (1) year when stored in un opened, tightly sealed containers in a dry location at 70oF. If there is a doubt as to the quality of the materials, consult a Sauereisen representative.

Consult Material Safety Data Sheets and container label Caution Statements for hazards in handling these materials.