Dow Dowsil 3-1944 RTV Coating

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Description for Dow Dowsil 3-1944 RTV Coating

Coating or adhesive with added UV indicator, good flowability, fast tack free time, good flame resistance, MIL A-46058 tested, Require atmospheric moisture to cure needing no expensive ovens, and various viscosity<br/>version faciliate different application methods.

*See Terms of Use Below

Brand	Dowsil
Application Type	Adhesive, Gaskets, Coating
1 Part or 2 Part	1 Part
Material Form	Liquid, Silicone elastomer
Substrate	Ceramics, Glass, Reactive metals, Plastics, Resins
Industry	Circuit board, Light Emitting Diodes (LEDs), PCB system assemblies, E-Mobility Solutions, Smart Meters, Insulation, Smart Home Devices, Headlamp assemblies, CRT module, Electronic equipment, Electronics, LCD module, Modules, PDP module, Power supplies, Most delicate components, Interconnections
Manufacturer	Dow
Chemistry	Silicone elastomer, Solventless
Application Method	Flow: Flow Coating
Cure Method	Atmospheric moisture, RTV, Room temp cure, Heat
Cure Temperature (°C)	Faster or lower, 20 to 25, 20 to 25
Cure Time (min)	1,440
Viscosity (cPs)	63,775, Good flowability, Self-leveling after dispensing
Color	Translucent
High Temperature Resistance (°C)	200
Low Temperature Resistance (°C)	-45, -55
Stress Relief	Low stress
Elastomeric	Elastomer
Key Specifications	IPC (Association Connecting Electronics Industries): IPC-CC-830B; Agency Listing, UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): UL 94: UL 94 V-0; UL Flammability Classification, UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): UL 746 and Mil Spec tested, Mil-Spec (United States Military Standard): Mil I-46058C Amend 7, UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): UL 746E; Agency Listing

Best Practices for Dow Dowsil 3-1944 RTV Coating

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Technical Data for Dow Dowsil 3-1944 RTV Coating

*See Terms of Use Below

Overview

Application Type
- Gasketing - Gaskets
- Coating
- Adhesive
1 Part or 2 Part
- 1 Part or 2 Part - 1 Part
Material Form
- Elastomer - Silicone elastomer
- Liquid
Substrate
- Ceramic - Ceramics
- Glass
- Metal - Reactive metals
- Plastic - Plastics, Resins
- Other - Laminates, Most common materials, Most common substrates, Low-surface energy surfaces
Industry
- LED (Light-Emitting Diodes) - Light Emitting Diodes (LEDs)
- Smart Meters
- Smart Home Devices
- E-Mobility Solutions
- Headlamp - Headlamp assemblies
- Electronics - Circuit board, CRT module, Electronic equipment, LCD module, Modules, PDP module, Power supplies, Interconnections, Most delicate components
- Printed Circuit Board (PCB) - PCB system assemblies
- Power Supplies
- Industrial - Housings, Lids
- Insulation
- Other - Pin joint coverage, Solder joint coverage, Thin section encapsulation, Spot protection of other devices, Spot protection of pins
Chemistry
- Solvent-Free - Solventless
- Silicone - Silicone elastomer
Application Method
- Brush
- Flow: Flow Coat - Flow Coating
- Other - Syringe or needle
Cure Method
- Room Temperature / Air Dry - Room temp cure
- Moisture / Condensation Cure - Atmospheric moisture
- Heat
- RTV (Room Temperature Vulcanization) - RTV
Color
- Translucent
Key Specifications
- IPC (Association Connecting Electronics Industries): CC-830B - IPC-CC-830B; Agency Listing
- UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): UL 94: V0 - UL 94 V-0; UL Flammability Classification
- UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): 746 - UL 746 and Mil Spec tested
- 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): 746E - UL 746E; Agency Listing
Brand
- Dowsil

Specifications

Cure Specs

Cure Temperature (°C)	Faster or lower, 20 to 25, 20 to 25
Cure Time (min)	1,440
Viscosity (cPs)	63,775, Good flowability, Self-leveling after dispensing
Tack Free Time (min)	Fast, 14, 0.50	Test Method
Thixotropic	Limited, Moderate

Bond Strength

General Bond Strength (psi)	Good
Peel Strength (piw)	3 (N/cm)	Test Method
Tensile Strength (psi)	325

Material Resistance

Flame Resistance	Good
Environmental Resistance	Environmentally friendly
High Temperature Resistance (°C)	200
Low Temperature Resistance (°C)	-45, -55
Moisture/Humidity Resistance	Moisture/humidity resistance

Conductivity

Dissipation Factor	0.00130, <0.00020	Test Method
Dielectric Strength (V/mil)	525
Dielectric Constant	2.67, 2.73	Test Method
Volume Resistivity (O)	1.6e15 (ohms/cm)

Hardness

Stress Relief	Low stress
Shore A Hardness	36	Test Method
Elastomeric	Elastomer
Elongation (%)	145
Flexibility	Soft
Modulus (psi)	223	Test Method

Other Properties

Specific Gravity	1.030

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 (mon)	12

Not Good For

Don't Use With	Plastic, rubber

Best Practices for Dow Dowsil 3-1944 RTV Coating

*See Terms of Use Below
1. Surface Preparation
  
  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.
2. Mixing
  
  No mixing required
3. Deairing/Degassing
  
  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.
4. Curing
  
  Time to cure is dependent on several variables including the method of application, film thickness, temperature and humidity. Tack-free time in the data table gives an indication of typical times until surface is dry enough to handle. Cure time for full cure are indications of time needed to develop full physical properties such as durometer, tensile strength or adhesion. These times, including full cure time, can be significantly improved by introducing mild heat of 60°C or less.
Comparable Materials for Dow Dowsil 3-1944 RTV Coating

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Spec Engine^® Results
- Dowsil 3140 RTV Coating(Dow)
  One-part, translucent adhesive or coating with good flowability, good flame resistance, UL, IPC and Mil spec tested.
- Dowsil Q4-2817 Fluorosilicone Sealant(Dow)
  ▪ High strength ▪ Retains its properties under exposure to fuels, oils and solvents ▪ Excellent adhesion and bond strength to most materials ▪ Resistant to weathering, moisture and ozone
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