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Non-corrosive, platinum-cured silicone formulation ensuring long-term compatibility with sensitive electronics and metals.
Ultra-low modulus and excellent flow characteristics for complete void filling and stress-free encapsulation of delicate components.
Outstanding dielectric stability across wide temperature range (−50 °C to +200 °C) and high humidity conditions.
UL 94 V-0 rated for flame retardancy, supporting safety compliance in demanding electrical environments.
Two-component, room-temperature curing system with extended working time and low exotherm for precision dispensing.
Thermal and electrical insulation of high-voltage power electronics, including IGBT modules and inverters.
Encapsulation and protection of LED drivers, EV battery management systems (BMS), and onboard chargers.
Dielectric filling for sensors, connectors, and junction boxes exposed to thermal cycling and vibration.
Conformal coating alternative for PCBs requiring reworkability and zero outgassing in aerospace and medical devices.
| Chemical Type | Platinum-cured silicone elastomer |
| Product Form | Two-component liquid kit (Part A + Part B) |
| Appearance | Translucent, viscous gel (Part A); colorless to pale yellow liquid (Part B) |
| Primary Applications | Dielectric encapsulation, thermal interface, and environmental protection of electronic assemblies |
| Key Features | Non-corrosive, low modulus, UL 94 V-0, RTV cure |
| Benefits | Stress relief, long-term reliability, no post-cure required, RoHS compliant |
| Cure System | Platinum-catalyzed addition cure |
| Shelf Life (unopened) | 12 months at 25 °C, stored in original sealed containers |
Q1: What is the primary function of DOWSIL 3-4150 Silicone Dielectric Gel Kit in electronic assembly?
A: DOWSIL 3-4150 is a two-part, addition-cure silicone gel system designed to provide long-term electrical insulation, thermal management, and mechanical protection for sensitive electronic components—particularly in high-reliability applications such as power electronics, LED modules, and sensors exposed to thermal cycling or vibration.
Q2: How is the kit supplied, and what are the typical mixing and curing conditions?
A: The kit is supplied as separate Part A (base) and Part B (catalyst) components, pre-weighed for accurate 1:1 mix ratio by weight. It cures at room temperature with extended pot life, or more rapidly with mild heat (e.g., 60–80 °C), forming a soft, low-modulus, tack-free gel with excellent conformality and stress relief properties.
Q3: Is DOWSIL 3-4150 suitable for use in high-voltage applications?
A: Yes—it exhibits excellent dielectric strength and volume resistivity, and maintains stable electrical performance across wide temperature and humidity ranges, making it appropriate for medium- to high-voltage insulation applications where creepage and clearance enhancement are required.
Q4: Can this gel be reworked or removed after cure?
A: Once fully cured, DOWSIL 3-4150 forms a thermoset network and is not readily reworkable. However, its ultra-low modulus and non-adhesive nature allow for careful mechanical removal in many cases without damaging underlying substrates—though full rework is not recommended for precision assemblies.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
