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Dow DOWSIL 3-4207 Dielectric Gel Tough Green 200 mL Kit - PF34207200

$140.50
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SKU: PF34207200
California prop 65
Description
  • Tough dielectric gel. Dow DOWSIL 3-4207 Dielectric Tough Gel Clear-Green is a two-component, room-temperature-curing silicone gel used for electrical insulation and protecting electrical components from contaminants, moisture, and stress. It is durable, fast curing, requires no primer, and has good mechanical strength. It uses a 1:1 mix ratio. This kit is a Dow product repackaged by KitPackers.
  • Tough vs standard gels. Gels are a special class of encapsulant that cure to an extremely soft, self-healing, resilient material. Tough gels like 3-4207 cure slightly harder than standard gels and have enhanced chemical adhesion, giving added strength while retaining the stress-relief benefits of a gel. Dow describes it as a translucent green, low-viscosity tough gel.
  • Features and inspection. 3-4207 offers a built-in UV indicator to aid inspection, conditional primerless adhesion, and good flame resistance. It cures quickly at room temperature, with no need for an oven, though it can be heat-accelerated if desired, and it is compatible with automated dispensing equipment for production use.
  • Handling notes. Dow notes that under certain conditions the tough gel may lose adhesion, so full environmental exposure testing is recommended for demanding applications. Higher-viscosity or faster-curing gels may need degassing to ensure a void-free layer. Review the product and Safety Data Sheets before use.

Recommended For

  • Electrical insulation and component protection
  • Potting PCB system assemblies
  • Protection from contaminants, moisture, and stress
  • Applications needing a tougher gel with primerless adhesion
  • Automated dispensing production lines

Product Details

  • Product type: Two-part silicone dielectric tough gel
  • Color: Translucent green
  • Mix ratio: 1:1
  • Cure: Fast room-temperature cure (heat-accelerated optional)
  • Key properties: Durable, good mechanical strength, UV indicator, conditional primerless adhesion, flame-resistant
  • Packaging: Repackaged by KitPackers; 200 mL kit

Primary Industries

  • Electronics and PCB manufacturing
  • Automotive electronics
  • High-voltage and power electronics
  • Optoelectronics

Standards and Certifications

  • None specified by source
Reviews

FAQs

What is DOWSIL 3-4207 used for?

It is a two-part 'tough' dielectric silicone gel used for electrical insulation and protecting components from contaminants, moisture, and stress. It cures fast at room temperature to a durable, resilient gel with good mechanical strength, making it suitable for potting and protecting sensitive electronic assemblies.

How is a 'tough' gel different from a standard gel?

Tough gels cure slightly harder than standard gels and offer enhanced chemical adhesion, providing added strength while retaining the stress-relief and self-healing benefits of a gel. This makes 3-4207 a good choice where a standard soft gel would lack the mechanical robustness a design needs.

Does 3-4207 need a primer?

Dow describes it as having conditional primerless adhesion, meaning it can adhere without a separate primer under suitable conditions. However, because tough gels may lose adhesion under certain conditions, Dow recommends full environmental exposure testing for demanding applications to confirm the bond holds up in service.

What is the built-in UV indicator for?

The UV indicator lets operators and automated inspection systems verify gel coverage and presence under ultraviolet light, which is helpful for quality control on populated boards. Combined with its translucent green color, this aids in visually confirming that components are properly protected.

How is it mixed and cured?

3-4207 uses a 1:1 mix ratio and cures quickly at room temperature, with no oven required, though it can be heat-accelerated for faster processing. It is compatible with automated dispensing equipment. Consult the technical data sheet for cure times and degassing guidance for void-free results.