HomeProducts RTV-2 Silicone Rubber Condensation Cure Silicone Rubber ShinEtsu KE-17 – RTV I Moisture‑Resistant Sealant for Electronics and General Sealing
ShinEtsu KE-17 – RTV I Moisture‑Resistant Sealant for Electronics and General Sealing

ShinEtsu KE-17 – RTV I Moisture‑Resistant Sealant for Electronics and General Sealing

A one‑part condensation cure silicone rubber with adjustable cure properties for versatile sealing.
PRODUCTS DESCRIPTION

KE-17 is a one-part condensation-cure RTV silicone rubber designed for room-temperature sealing and bonding tasks that require flexible curing control. Supplied as a ready-to-use paste, it can be applied directly without mixing, offering stable extrusion, smooth tooling, and predictable handling during application. During curing, KE-17 reacts gradually with ambient moisture and transitions into an elastic rubber, allowing users to manage working time more easily while maintaining consistent curing behavior in daily production or maintenance environments.

products parameters

Composition:One‑Part RTV Silicone
Appearance:Paste
Cure System:Condensation (moisture Cure)
Specific Gravity:~1.02
Packaging:1kg

key features

  • Cure Control - KE-17 offers adjustable curing behavior suited for varied processing schedules. Under standard conditions of 23 °C and 50 percent relative humidity, surface skin formation typically occurs within 15 to 30 minutes, while full cure progresses at an average rate of 2 to 3 mm per 24 hours. This controllable curing response supports better timing coordination during application and assembly.


  • Moisture Resistance - After full cure, KE-17 forms a silicone elastomer with low water absorption characteristics. Typical water uptake remains below 0.5 percent by weight after 24 hours of immersion at room temperature. This resistance helps maintain sealing performance and mechanical stability in environments exposed to humidity or intermittent moisture.


  • Elastic Stability - KE-17 maintains elasticity after curing, allowing it to accommodate movement and vibration over long service periods. Typical elongation at break exceeds 300 percent, while Shore A hardness commonly falls between 20 and 30. These values support flexible joint behavior without cracking or loss of sealing continuity.


  • Adhesion Strength - KE-17 develops reliable adhesion to common substrates such as metals, glass, and ceramics. Typical tensile adhesion strength ranges from 0.6 to 1.0 MPa under standard test conditions. This bonding performance supports stable joint integrity under static loads and moderate mechanical stress.

application
  • Electronics Sealing - KE-17 is used to seal electronic housings and assemblies where moisture protection is required. Once cured, silicone layers typically exhibit volume resistivity above 1 × 10¹³ Ω·cm. This electrical stability supports protection of connectors, enclosures, and non-heat-sensitive electronic components from humidity exposure.


  • Construction Joints - In construction environments, KE-17 is applied to seal joints and bonding interfaces exposed to ambient conditions. Joint thicknesses in the range of 3 to 10 mm can cure evenly under normal temperature and humidity. The cured silicone maintains joint integrity during thermal expansion and contraction cycles.


  • Automotive Gasketing - KE-17 is suitable for forming elastic gaskets in automotive assemblies subject to vibration and temperature variation. The cured elastomer shows stable performance across a typical service temperature range from approximately −50 °C to 180 °C. This range supports reliable sealing in common automotive operating conditions.


  • Industrial Sealing - In general industrial applications, KE-17 is used to seal equipment panels, housings, and mechanical interfaces. Its paste consistency allows controlled bead application on vertical and horizontal surfaces. Predictable curing behavior supports consistent sealing quality during assembly and maintenance operations.

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