Shin-Etsu KE-4890 UL94 V-1 RTV Silicone Adhesive Sealant for Electronic Gasketing & Sealing
Shin-Etsu KE-4890 is a one-component, condensation-cure (neutral/de-alcohol), thixotropic white RTV silicone adhesive/sealant with UL 94 V-1 rating, low odor and non-corrosive properties.
| Item |
Value |
| Type |
Adhesive / Sealant |
| Cure Type |
Condensation (De-alcohol) |
| One / Two Component |
One |
| UL Listing |
Yes (UL 94 V-1) |
| Cold Storage |
Yes |
| Low Molecular Weight Siloxane Stripped |
Yes |
| Color |
White |
| Density @ 23°C (g/cm³) |
1.45 |
| Cure Conditions |
7 days @ 23°C / 50% RH |
| Tack Free Time (min) |
8 |
| Shore A Hardness |
50 |
| Tensile Strength (MPa) |
2.00 |
| Elongation (%) |
150 |
| Shear Strength (MPa) |
2.00 |
| Volume Resistivity (TΩ·m) |
6 |
| Dielectric Strength (kV/mm) |
25 |
| Dielectric Constant (@ 50 Hz) |
3.3 |
| Dielectric Dissipation Factor (@ 50 Hz) |
1 * 10⁻³ |
| Thermal Conductivity (W/m·K) |
0.33 |
| Usable Temperature Range (°C) |
-40 to +180 |
KE-4890 cures at room temperature into a tough, durable elastomer and exhibits excellent unprimed adhesion to metals, plastics, glass and ceramics. It is designed for sealing and bonding applications in electronic and electrical devices requiring flame retardancy and electrical insulation.
This product is a thixotropic paste (non-slump) suitable for vertical application and complex grooves. Low-molecular-weight siloxane stripped to minimize contact migration issues. It offers volume resistivity of 6 TΩ·m and dielectric strength of 25 kV/mm, usable from -40°C to +180°C, with tack-free time ~8 min and full cure in 7 days @ 23°C/50% RH.
Typical applications include form-in-place gasketing (FIPG) for electronic enclosures, moisture/ dust sealing of PCBs and electronic components, sealing of power supply modules, protection and fixing of electronic parts in household appliances (refrigerators, air conditioners), and sealing of automotive electronic control units.
FAQ
1. Who are we?
We are Shenzhen Huazhisheng New Material Technology Co., Ltd., a professional industrial adhesives and sealants supplier based in China since 2018. we serve global markets: Mainland China (60%), Southeast Asia (20%), North America (10%), and Europe (10%).
2. What products do you offer?
we supply high-performance adhesives and sealants from global leaders including:
Cemedine, Dow Corning, Shin-Etsu, Araldite, and Momentive,etc.
3. How do you guarantee product quality?
Quality assurance through:
Mandatory pre-production samples approval
Final inspection by QC team before shipment
International certifications: SGS, UL, FDA, RoHS, REACH
4. Why choose us over other suppliers?
Reliable Supply:Authentic products from top manufacturers
Expert Support:Technical guidance for product selection
Global Compliance:Certifications meeting target market standards
Efficient Service:Customized solutions & professional support
5. What services do you provide?
Delivery:EXW/FOB/CIF
Payment:USD/EUR/CNY/HKD via T/T, L/C
Support:Technical consultation & logistics coordination
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