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Description for Dow 1-2577 RTV Coating
One-part, medium viscosity; solvent-borne, elastoplastic silicone resin; excellent abrasion resistance; RTV or heat accelerable cure.Chemical Resistance Good Application Type Conformal Coat 1 Part or 2 Part 1-Part Material Form Liquid Industry Electronic Printed Wiring Board (PWB), E-Mobility Solutions, Smart Meters, Smart Home Devices, Headlamp assemblies, Flexible circuit boards, Rigid circuit boards Manufacturer Dow Chemistry Silicone resin Application Method Flow: Flow coating Cure Method Moisture, RTV Cure Temperature (°C) 25, 20 to 25 Cure Time (min) 4,320, 10 Viscosity (cPs) Medium, 950 Color Transparent, Clear Ozone Resistance Ozone resistance High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45 Volume Resistivity (O) 5E+13 (ohms/cm) Key Specifications IPC (Association Connecting Electronics Industries): IPC-CC-830A, Amendment 1, UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): UL 94: UL V-0 flammability rating, UL746E, Mil-Spec (United States Military Standard): I-46058-C: MIL-I-46058C, Amend. 7 -
Technical Data for Dow 1-2577 RTV Coating
Overview
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Chemical Resistance
- Chemical Resistance - Good
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Application Type
- Conformal Coating - Conformal Coat
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1 Part or 2 Part
- 1-Part
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Material Form
- Liquid
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Industry
- Smart Meters
- Smart Home Devices
- E-Mobility Solutions
- Headlamp - Headlamp assemblies
- Electronics - Electronic Printed Wiring Board (PWB), Flexible circuit boards, Rigid circuit boards
- Power Supplies - Elastoplastic toughened coating
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Chemistry
- Silicone - Silicone resin
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Application Method
- Dispenser - Robotic dispensing, Select coating
- Brush
- Spray
- Flow : Flow Coat - Flow coating
- Dip
- Screen Print - Automated pattern
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Cure Method
- Moisture / Condensation Cure - Moisture
- RTV (Room Temperature Vulcanization) - RTV
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Color
- Clear / Transparent - Transparent, Clear
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Key Specifications
- UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association) - UL746E
- IPC (Association Connecting Electronics Industries) : CC-830 - IPC-CC-830A, Amendment 1
- UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association) : UL 94 : V0 - UL V-0 flammability rating
- Mil-Spec (United States Military Standard) : I-46058-C : Amd. 7 - MIL-I-46058C, Amend. 7
Specifications
Cure Specs
Cure Temperature (°C) 25, 20 to 25 Test Method Cure Time (min) 4,320, 10 Test Method Viscosity (cPs) Medium, 950 Tack Free Time (min) 7, 1.30 Test Method Work / Pot Time (min) >86,400 Test Method Material Resistance
Ozone Resistance Ozone resistance Abrasion Resistance Abrasion UV Resistance UV resistance Environmental Resistance Environmental resistance High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45 Moisture/Humidity Resistance Moisture/humidity resistance Conductivity
Dissipation Factor 0.00420, <0.00020 Test Method Dielectric Strength (V/mil) Durable, 400 Dielectric Constant 2.74, 2.74 Test Method Volume Resistivity (O) 5E+13 (ohms/cm) Hardness
Shore A Hardness 80 Flexibility Flexible Other Properties
Specific Gravity 1.040, 1.110 Flash Point (°F) 41.0 Business Information
Shelf Life Details Shelf life is indicated by the “Use Before” date found on the product label. Shelf Life Temperature (°F) 77 Shelf Life Type From date of manufacture Shelf Life (mon) 36 -
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Best Practices for Dow 1-2577 RTV Coating
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Curing
The time required to reach a tack-free state can be reduced with heat. When using heat for this purpose, allow adequate time for the solvent to evaporate prior to exposing to elevated temperatures in an air circulating oven. A typical cure schedule for 3 mil coatings is 10 minutes at room temperature, followed by 10 minutes at 80°C. If the coating blisters or contains bubbles, allow additional time at room temperature for the solvent to flash off prior to oven cure.
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Testing
If a substrate or material is questionable with respect to potentially causing inhibition of cure, it is recommended that a small scale compatibility test be run to ascertain suitability in a given application. The presence of liquid or uncured product at the interface between the questionable substrate and the cured gel indicates incompatibility and inhibition of cure.
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Comparable Materials for Dow 1-2577 RTV Coating
Spec Engine® Results
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Cure Temperature Test Methods
Cure Temperature | Cure Time Test Method |
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25°C | Typical for a 5-mil thickness sample in 180° peel. |
20 to 25°C | Followed by 10@ 80°C, Time to cohesive failure on a 180° peel strip. Coating strength may continue to improve with time. |
Cure Time Test Methods
Cure Time | Test Method |
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4,320 min | Typical for a 5-mil thickness sample in 180° peel. |
10 min | Followed by 10@ 80°C, Time to cohesive failure on a 180° peel strip. Coating strength may continue to improve with time. |
Tack Free Time Test Methods
Tack Free Time | Tack Free Temperature | Test Method |
---|---|---|
7 min | 25°C | |
1.30 min | 60°C | Tack-Free Time at 60ºC/15% RH |
Work / Pot Time Test Methods
Work / Pot Time | Temperature |
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>86,400 min | <29°C |
Dielectric Constant Test Methods
Dielectric Constant | Test Method |
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2.74 | Dielectric Constant, 100 Hz |
2.74 | Dielectric Constant, 100 kHz |
Dissipation Factor Test Methods
Dissipation Factor | Test Method |
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0.00420 | Dissipation Factor, 100 Hz |
<0.00020 | Dissipation Factor, 100 KHz |