Sauereisen - Model No. 11 -Thermal Potting Cement

• High electrical resistance.
• †Heat conductive and thermal shock resistant.
• †Withstands temperatures to 2200oF (1204oC).
• †Ideal for potting applications.
• †Chemical set.
• †Odorless.

Mixing

Sauereisen No. 11 is supplied as a Powder and mixed with potable water as used. No. 11 Powder should be thoroughly remixed before using to ensure proper dispersion of crucial ingredients. Weigh out approximately 100 parts Powder and 15 parts water. Place measured amount of water into a clean mixing container and gradually add No. 11 Powder to water 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.

A minimum amount of water should be used as excess water reduces mechanical strength, increases shrinkage and delays set time. Failure of cement to adhere indicates setting has begun - discard cement. Do not attempt to retemper by adding more water.

Application

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 help to prevent the moisture of the curing cement from wicking into the substrate.

Thermal Potting Cement No. 11 may be placed by brushing, pouring or other automatic dispensing methods. Since the cement sets by a chemical process that occurs when water reacts with the No. 11 Powder, there are no maximum thickness restrictions for application.

• Coefficient of thermal expansion (ASTM C372): 3.4x10-6/F°(6.1 x 10-6/C°)
• Color: Off white
• Density (ASTM C20): 123 pcf (1.97gm/cm3)
• Dielectric constant (ASTM D150): 7.6
• Dielectric strength (ASTM D149) @70°F(21°C): 46-54 Volts/mil (1748-2052) Volts mil
• Flexural strength    (ASTM C580): 450 psi (31 kg/cm?)
• Maximum service temperature: 2200°F(1204°C)
• Mix ratio (powder to water, by weight)|: 100:15
• Tensile strength (ASTM C307): 100 psi (7 kg/cm2)
• Thermal conductivity: 4.9 Btu-in/ft2-hr°F (1.7 x 10-3 Cal-cm/cm2-sec-°C)
• Volume resistivity (ASTM D1829) @70°F(21°C): 109-101° ohm-cm

Thermal Potting Cement No. 11 takes an initial set in approximately one hour at 70oF and develops a strong mechanical bond in 18 to 24 hours at room temperature.

If it is desired to accelerate the cure, low temperature oven drying at 180oF can be used. Avoid steaming while drying. Proper curing of the cement is critical to developing maximum strengths. If the cement will be exposed to elevated temperatures that may approach or briefly exceed the recommended service limits, consult Sauereisen for further drying guidelines.

A heat cure is also suggested where humidity resistance is required. In addition, a moisture-resistant lacquer or silicone coating may be applied to the exposed surfaces.

1-quart and 1-gallon cans; 50-lb. moisture- resistant bags on plastic-wrapped pallets.

All equipment should be cleaned with soap and water before Sauereisen cements cure. If removal is required after the cure, a low concentration of sodium hydroxide may dissolve the cement. Consult Sauereisen for other recommendations.

Sauereisen No. 11 Powder has a shelf life of one 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.

Consult Material Safety Data Sheets and container label Caution Statements for any hazards in handling this material.