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Description for Dow 1890 Protective Coating
One-part, protective silicone rubber coating for motors and electrical equipment.Application Type Coat, Seal 1 Part or 2 Part 1-Part Material Form Thick Liquid Substrate Glass, Painted metal, Wood, Unpainted metal Industry Electrical equipment, Threaded studs, Transformers, Connectors, Smart Home Devices, Food processing plants, Quarries, Power Tools, Motors, Mines, Fan motor for a farm tractor, Insulated motor windings Manufacturer Dow Chemistry Silicone rubber Cure Method Moisture Cure Temperature (°C) 20 to 25, 25 Cure Time (min) 10,080 Viscosity (cPs) 40,000 Color Gray High Temperature Resistance (°C) 177, 204 Low Temperature Resistance (°C) -59 Volume Resistivity (O) 2e15 (ohms/cm) Key Specifications FDA (U.S. Food & Drug Administration) and/or CFIA (Canadian Food Inspection Agency): FDA 21 CFR177.2600 -
Technical Data for Dow 1890 Protective Coating
Overview
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1 Part or 2 Part
- 1-Part
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Material Form
- Liquid - Thick Liquid
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Industry
- Mechanical Fastening Parts - Threaded studs
- Food & Beverage - Food processing plants
- Other Transportation - Bus bars
- Smart Home Devices
- Electronics - Electrical equipment
- Transformers
- Connectors
- Industrial - Dye houses, Fertilizer plants, Formed-steel split housing, Insulator pins, Splices, Taconite mills, Tanneries
- Mines and Quarries - Quarries, Mines
- Power Tools
- Motors - Insulated motor windings, Fan motor for a farm tractor
- Construction - Cement plants
- Packaging - Bottling plants, Packing, Paper mills
- Drug/Pharmaceutical - Dairies
- Furniture / Wood-Working - Wooden pole tops
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Chemistry
- Silicone - Silicone rubber
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Application Method
- Brush - Stiff-bristle nylon brush
- Spray
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Cure Method
- Moisture / Condensation Cure - Moisture
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Color
- Gray
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Key Specifications
- FDA (U.S. Food & Drug Administration) and/or CFIA (Canadian Food Inspection Agency) : 177.2600 - FDA 21 CFR177.2600
Specifications
Cure Specs
Cure Temperature (°C) 20 to 25, 25 Test Method Cure Time (min) 10,080 Test Method Viscosity (cPs) 40,000 Tack Free Time (min) 25 Work / Pot Time (min) 15 Material Resistance
UV Resistance UV resistance Environmental Resistance Environmental resistance High Temperature Resistance (°C) 177, 204 Low Temperature Resistance (°C) -59 Moisture/Humidity Resistance Excellent Conductivity
Dissipation Factor 0.00007, 0.00018 Test Method Dielectric Constant 2.50, 2.50 Test Method Volume Resistivity (O) 2e15 (ohms/cm) Test Method Hardness
Shore A Hardness 21, Good Flexibility Flexible Other Properties
Flash Point (°F) 50.0 Business Information
Shelf Life Details When stored at 90°F (32°C), Dow Corning 1890 Protective Coating has a shelf life of 12 months from date of manufacture. Refer to product packaging for “Use By” date. Shelf Life Type From date of manufacture Shelf Life (mon) 12 Not Good For
Don't Use With Concrete, Brick, Mortar, Other masonry surfaces, Paints, Impregnated woods, Oil-based caulks that bleed oils, Polyethylene, Polypropylene, Methylmethacrylate, Copper, Brass, Zinc, Carbon steel, Galvanized iron, Magnesium -
Best Practices for Dow 1890 Protective Coating
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Surface Preparation
Clean and dry all surfaces to be coated before applying this coating.
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Application
Dow Corning 1890 Protective Coating can be applied as received by brushing on with a stiff-bristle nylon brush. If spraying is preferred, this dispersion can be thinned with VM&P naphtha to provide the optimum viscosity required for spraying equipment. Only normal brushing or spraying techniques are needed.
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Cure Temperature Test Methods
Cure Temperature | Cure Time Test Method |
---|---|
20 to 25°C | |
25°C | As Cured 7 days at 77°F (25°C) and 50% RH |
Cure Time Test Methods
Cure Time | Test Method |
---|---|
10,080 min | As Cured 7 days at 77°F (25°C) and 50% RH |
Dielectric Constant Test Methods
Dielectric Constant | Temperature | Test Method |
---|---|---|
2.50 | 25°C | 100 Hz, As Cured 7 days at 77°F (25°C) and 50% RH |
2.50 | 25°C | 100 kHz, As Cured 7 days at 77°F (25°C) and 50% RH |
Dielectric Strength Test Methods
Dielectric Strength | Temperature | Test Method |
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Dissipation Factor Test Methods
Dissipation Factor | Temperature | Test Method |
---|---|---|
0.00007 | 25°C | 100 Hz, As Cured 7 days at 77°F (25°C) and 50% RH |
0.00018 | 25°C | 100 kHz, As Cured 7 days at 77°F (25°C) and 50% RH |
Volume Resistivity Test Methods
Volume Resistivity | Temp (°C) | Test Method |
---|---|---|
2e15 (ohms/cm) | 25°C | As Cured 7 days at 77°F (25°C) and 50% RH |