Application Type Seal, Gasket, Bond 1 Part or 2 Part 2 Part Material Form Liquid, Silicone elastomer Substrate Ceramics, Glass, Reactive metals, Plastics, Resins Industry Solar cell, Solar cell Manufacturer Dow Chemistry Silicone elastomer Cure Method Part A/Part B, RTV Cure Temperature (°C) Faster or lower, 20 to 25, 20 to 25 Cure Time (min) Rapid Viscosity (cPs) 11,000 Color White High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45, -55
Technical Data for Dow CY 51-019
1 Part or 2 Part
- 1 Part or 2 Part - 2 Part
- Elastomer - Silicone elastomer
- Silicone - Silicone elastomer
- 2-Part Cure - Part A/Part B
- RTV (Room Temperature Vulcanization) - RTV
Cure Temperature (°C) Faster or lower, 20 to 25, 20 to 25 Cure Time (min) Rapid Viscosity (cPs) 11,000 Tack Free Time (min) Fast Test Method Work / Pot Time (min) 240 Test Method Thixotropic Good Mix Ratio 10:1 (by volume)
Shear Strength (psi) 120 Test Method Tensile Strength (psi) 160
Environmental Resistance Environmental resistance High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45, -55 Moisture/Humidity Resistance Moisture/humidity resistance
Dissipation Factor 0.00400 Test Method Dielectric Strength (V/mil) Good, 19,685,039, Durable Dielectric Constant 3.10 Test Method Volume Resistivity (O) 4E+12 (ohms/cm)
Shore A Hardness 34 Elongation (%) 2 Flexibility Flexible
Specific Gravity 1.270
Shelf Life Details Shelf life is indicated by the “Use Before” date found on the product label. For best results, Dow Corning RTV adhesives should be stored at or below 25°C (77°F). Special precautions must be taken to prevent moisture from contacting these materials. Containers should be kept tightly closed with head or air space minimized. Partially filled containers should be purged with dry air or other gases, such as nitrogen. Shelf Life Type from date of manufacture Shelf Life (mon) 12
Not Good For
Don't Use With Plastic, rubber
Best Practices for Dow CY 51-019
All surfaces should be thoroughly cleaned and/or degreased with Dow Corning® brand OS Fluids, naphtha, mineral spirits, methyl ethyl ketone (MEK) or other suitable solvent. Solvents such as acetone or isopropyl alcohol (IPA) do not tend to remove oils well, and any oils remaining on the surface may interfere with adhesion. Light surface abrasion is recommended whenever possible, because it promotes good cleaning and increases the surface area for bonding. A final surface wipe with acetone or IPA is also useful. Some cleaning techniques may provide better results than others
users should determine the best techniques for their particular applications.
Upon standing, some filler may settle to the bottom of the liquid containers after several weeks. To ensure a uniform product mix, the material in each container should be thoroughly mixed prior to use. Two-part materials should be mixed in the proper ratio (1:1 or 10:1) either by weight or volume. The presence of light colored streaks or marbling indicates inadequate mixing.
Automated airless dispense equipment can be used to reduce or avoid the need to de-air. If de-airing is required to reduce voids in the cured elastomer, consider a vacuum de-air schedule of >28 inches Hg for 10 minutes or until bubbling subsides.
Comparable Materials for Dow CY 51-019
Spec Engine® Results
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Tack Free Time Test Methods
|Tack Free Time||Tack Free Temperature|
Work / Pot Time Test Methods
|Work / Pot Time||Temperature|
Shear Strength Test Methods
|120 psi||Lap shear strength|
Dielectric Constant Test Methods
|Dielectric Constant||Test Method|
|3.10||Dielectric constant, 1 MHz|
Dissipation Factor Test Methods
|Dissipation Factor||Test Method|
|0.00400||Dissipation factor, 1 MHz|