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Description for Dow 1-2620 Low VOC RTV Coating
One-part, low viscosity; ozone-safe, 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), Smart Meters, E-Mobility Solutions, Smart Home Devices, Insulation, Headlamp assemblies, Flexible circuit boards, Rigid circuit boards Manufacturer Dow Chemistry Silicone resin Application Method Flow: Flow coating Cure Method RTV, Moisture, Mild Heat Cure Temperature (°C) 20 to 25, 60, 60, 25 Cure Time (min) 60, 2.00, 10 Viscosity (cPs) 350, Low Color Translucent Ozone Resistance Ozone Resistance High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45, -55 Volume Resistivity (O) 1.05E+15 (ohms/cm) Key Specifications Mil-Spec (United States Military Standard): I-46058-C: Mil-I-46058C Amend. 7, UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): UL 94: UL-94 V-0 flammability rating, IPC (Association Connecting Electronics Industries): IPC-CC-830 Qualified, UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): (Amend.1) UL746E, IPC (Association Connecting Electronics Industries): IPC-CC-830A -
Technical Data for Dow 1-2620 Low VOC 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
- Insulation
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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
- Heat - Mild Heat
- RTV (Room Temperature Vulcanization) - RTV
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Color
- Translucent
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Key Specifications
- Mil-Spec (United States Military Standard) : I-46058-C : Amd. 7 - Mil-I-46058C Amend. 7
- UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association) : UL 94 : V0 - UL-94 V-0 flammability rating
- IPC (Association Connecting Electronics Industries) : CC-830 - IPC-CC-830 Qualified
- UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association) : 746E - (Amend.1) UL746E
- IPC (Association Connecting Electronics Industries) : CC-830A - IPC-CC-830A
Specifications
Cure Specs
Cure Temperature (°C) 20 to 25, 60, 60, 25 Test Method Cure Time (min) 60, 2.00, 10 Test Method Viscosity (cPs) 350, Low Tack Free Time (min) 15, 5.00 Test Method Work / Pot Time (min) >86,400 Test Method Material Resistance
Non-Corrosive Corrosion Resistance Ozone Resistance Ozone Resistance Abrasion Resistance Abrasion Resistance UV Resistance UV resistance Environmental Resistance Environmental resistance High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45, -55 Moisture/Humidity Resistance Moisture/humidity resistance Conductivity
Dissipation Factor 0.00200, 0.00400 Test Method Dielectric Strength (V/mil) Durable, 400 Dielectric Constant 2.49, 2.48 Test Method Volume Resistivity (O) 1.05E+15 (ohms/cm) Hardness
Shore A Hardness 80 Shore D Hardness 25 Flexibility Flexible Other Properties
Specific Gravity 1.000, 0.880, 1.120 Test Method Flash Point (°F) 60.8 Business Information
Shelf Life Details Storage conditions and shelf life (“Use by” date) are indicated on the product label. Shelf Life Temperature (°F) 77 Shelf Life Type From date of manufacture Shelf Life (mon) 12 -
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Best Practices for Dow 1-2620 Low VOC 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 1-2620 Low VOC RTV Coating
Spec Engine® Results
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Cure Temperature Test Methods
Cure Temperature | Cure Time Test Method |
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20 to 25°C | Typical for a 5-mil thickness sample in 180° peel. |
60°C | Time to cohesive failure on a 180° peel strip. Coating strength may continue to improve with time. Thicker samples require additional cure time., To prevent bubbles or voids from forming, applications thicker than 5 mils may require a 5- to 10-minute hold time at room temperature to allow solvents to evaporate before the material is exposed to higher temperatures, 15% RH |
60°C | |
25°C |
Cure Time Test Methods
Cure Time | Test Method |
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60 min | Typical for a 5-mil thickness sample in 180° peel. |
2.00 min | Time to cohesive failure on a 180° peel strip. Coating strength may continue to improve with time. Thicker samples require additional cure time., To prevent bubbles or voids from forming, applications thicker than 5 mils may require a 5- to 10-minute hold time at room temperature to allow solvents to evaporate before the material is exposed to higher temperatures, 15% RH |
10 min |
Tack Free Time Test Methods
Tack Free Time | Tack Free Temperature | Test Method |
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15 min | 25°C | |
5.00 min | 60°C | 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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2.49 | Dielectric constant, 100 Hz |
2.48 | Dielectric constant, 100 KHz |
Dissipation Factor Test Methods
Dissipation Factor | Test Method |
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0.00200 | Dissipation factor, 100 Hz |
0.00400 | Dissipation factor, 100 KHz |
Specific Gravity Test Methods
Specific Gravity | Test Method |
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1.000 | |
0.880 | Uncured |
1.120 | Cured |