Dow Dowsil 3140 RTV Coating

Overview

• Chemical Resistance

  • Chemical Resistance - Good

• Application Type

  • Coating
  • Adhesive
  • Pottant / Encapsulant - Encapsulant
  • Sealant - Sealing

• 1 Part or 2 Part

  • 1-Part

• Material Form

  • Elastomer - Silicone elastomer
  • Liquid

• Substrate

  • Ceramic - Ceramics
  • Glass
  • Metal - Many reactive metals
  • Plastic - Resins, Plastics
  • Other - Selected laminates

• Industry

  • Smart Meters
  • Smart Home Devices
  • E-Mobility Solutions
  • Headlamp - Headlamp assemblies
  • Electronics - Improved pin/solder joint coverage, Protection of rigid and flexible circuit boards, Protection of corrosion-sensitive components
  • Printed Circuit Board (PCB) - Pin sealing
  • Insulation
  • Joints - Improved pin/solder joint coverage

• Chemistry

  • Solvent-Free
  • Other - Polydimethylsiloxane
  • Silicone - Silicone elastomer

• Application Method

  • Dispenser - Syringe dispensed
  • Brush
  • Spray - Spraying
  • Flow
  • Flow : Flow Coat - Simple flow coating
  • Dip - Dipping
  • Other - Needle

• Cure Method

  • Room Temperature / Air Dry - Room temperature cure
  • Moisture / Condensation Cure - Moisture Cure
  • Heat
  • RTV (Room Temperature Vulcanization) - RTV

• Color

  • Translucent
  • Clear / Transparent - Clear to slightly hazy
  • Off-White - Clear to slightly hazy

• Key Specifications

  • UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association) : UL 94 : V-1 - UL 94 V-1 @ 1.4 mm (UL file QMJU2 - E81611), UL 94 V-1
  • IPC (Association Connecting Electronics Industries) : CC-830B - IPC-CC-830B, U: 746
  • Mil-Spec (United States Military Standard) : I-46058-C - Mil-I-46058C
  • UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association) : UL 94 HB - UL 94-HB @ 1.9 mm (UL file QMFZ2 – E40195)
  • Mil-Spec (United States Military Standard) : A-46146 : MIL-A-46146 Group II - MIL-A-46146
  • IPC (Association Connecting Electronics Industries) : CC-830A - IPC-CC-830

• Brand

  • Dowsil

Specifications

Cure Specs

Cure Temperature (°C)	At room temperature	Test Method
Cure Time (min)	1,440 to 4,320	Test Method
Viscosity (cPs)	Good flowability, 34,400, Smooth, Self-leveling
Tack Free Time (min)	116	Test Method
Fluorescent	UV indicator for manual and automated inspection

Bond Strength

General Bond Strength (psi)	Good
Peel Strength (piw)	40 (ppi)	Test Method
Tensile Strength (psi)	434

Material Resistance

Flame Resistance	Good flame resistance
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	0.00400, 0.00100	Test Method
Dielectric Strength (V/mil)	385
Dielectric Constant	2.52, 2.52	Test Method
Volume Resistivity (O)	2.1e10 (14), (ohm*cm)

Hardness

Shore A Hardness	32	Test Method
Elongation (%)	419	Test Method
Modulus (psi)	103	Test Method

Other Properties

Specific Gravity	1.050	Test Method
Flash Point (°F)	213.8

Business Information

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., For best results, Dow adhesives should be stored at or below the storage temperature listed on the product label.
Shelf Life Temperature (°F)	77 Room Temperature
Shelf Life Type	from date of manufacture, Shelf Life Type
Shelf Life (mon)	12

Not Good For

Don't Use With	Non-reactive metal substrates , Non-reactive plastic, Plastic substrates that are highly plasticized, Rubber substrates that are highly plasticized