Sauereisen - Model No. 4 - Flotemp Cement
From Corrosion Protection - Air-Setting Adhesives Products
Sauereisen Flotemp Cement No. 4 is used for potting applications where high electrical insulation and thermal conductivity are required. No. 4 is specially formulated to limit the wicking nature of a porous substrate. This will prevent permeation of water into the substrate and the associated volume loss or cavitation of the cement. The need for double filling of ceramic units may be eliminated.
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Characteristics
- Thermally conductive.
- Withstands temperatures to 2,200oF (1,204oC).
- Resists volume displacement caused by porous substrates.
- Low shrinkage.
- High electrical resistance.
- Chemical set.
- Odorless.
Instructions
Mixing
Sauereisen No. 4 is supplied as a Powder and mixed with potable water as used. No. 4 Powder should be thoroughly remixed before using to ensure proper dispersion of crucial ingredients. Weigh out approximately five parts Powder and one part water. Place measured amount of water into a clean mixing container and gradually add No. 4 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.
Physical Properties:
- Coefficient of thermal expansion : 6.18 x 10-6 in/in/oF (11.12 x 10-6 cm/cm/oC)
- Color : White
- Compressive strength : 1,385 psi (97 kg/cm2)
- Density : 141 pcf (2.25 gm/cm3)
- Dielectric constant : 3.0 - 4.0
- Dielectric strength @ 70oF (21oC) : 50-56 Volts/mil (1991 Volts/mm)
- Flexural strength : 748 psi (53 kg/cm2)
- Maximum service temperature : 2,200oF (1,204oC)
- Mix ratio (powder to water, by weight) : 5:1
- Modulus of elasticity : 2.37 x 106 psi (1.7 x 105 kg/cm2)
- Tensile strength : 345 psi (24 kg/cm2)
- Thermal conductivity @ 500oF (260oC) 5.47 BTU.in/ft2.hr.oF (1.88 x 10-3 Cal.cm/cm2.sec.oC)
- Volume resistivity @ 70oF (21oC) 1011- 1012 ohm-cm
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 assist the natural anti-cavitational property of the cement and may not be necessary in all applications. Flotemp Cement No. 4 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. 4 Powder, there are no maximum thickness restrictions for application.
Flotemp Cement No. 4 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. 4 Powder, there. are no maximum thickness restrictions. for application.
Setting/Curing
Flotemp Cement No. 4 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 No. 4 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, or Hi-Temp Primer No. 560 may be applied to the exposed surfaces.
Packaging
1-quart can, 1-gallon cans and 50-lb. moisture -resistant bags on plast icwrapped pallets.
Clean-Up
All equipment should be cleaned with soap and water be fore S aue reisen cements cure. If removal is required after the cure, a low concentration of sodium hydroxide may dissolve the cement. Consult Sauereisen for other recommendations.
Shelf Life
Sauereisen Flotemp Cement No . 4 Powder has a shelf life o f one year (1) 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.
Caution
Consult Material Safety Data Sheets and container label Caution Statements for any hazards in handling this material.
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