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One-part RTV silicone rubber

Applications

Seals, bonds and stakes components on circuit boards; seals housings, LED fixtures and sensors; forms gaskets in place on covers and flanges

Properties

Tack free 5–10 min / Hardness 30–40 Shore A / Tensile 2.5 MPa / Dielectric 20 kV/mm / Service -50 to 200 °C, non-corrosive

Storage

Below 30 °C, recap immediately after use

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Product description

Shin-Etsu One-Component RTV Silicone Rubber is a silicone sealant that cures at room temperature by reacting with atmospheric moisture, forming an elastic rubber that bonds firmly to metal, glass, ceramics and many plastics. The neutral-cure type releases no acid, making it safe for copper, printed circuits and sensitive electronic components.

Typical Applications

  • Staking capacitors, inductors and wires on circuit boards against vibration
  • Sealing LED light housings, junction boxes and outdoor sensors
  • Formed-in-place gaskets for gearbox covers, engine covers and flanges
  • Bonding glass and ceramics in heating appliances and ovens
  • Encapsulating connectors and solder joints against moisture

Advantages

  1. One-component, no mixing required, applied directly from tube or pump
  2. Neutral cure, non-corrosive to metals and components
  3. Remains elastic over a wide temperature range, absorbing vibration and thermal expansion
  4. Electrically insulating, moisture proof, resistant to weathering and ozone

Key Specifications

PropertyValue
Tack-free time (23 °C, 50% RH)5–10 minutes
Depth of cureapprox. 3 mm/24 hours
Hardness30–40 Shore A
Tensile strength2.5 MPa
Elongation at break300%

Application Notes

Surfaces must be clean, dry and free of oil and grease; use a primer on hard-to-bond plastics. Because it cures by moisture from the surface inward, do not apply in layers thicker than 6 mm or in fully enclosed gaps. Low humidity slows curing. Wait at least 24 hours before applying mechanical loads and 72 hours before water-tightness testing.

For equipment with relays or open contacts, choose a low-volatile RTV grade with reduced low-molecular-weight siloxane to avoid long-term contact failure.

Contact the technical team at AMS Vietnam for advice on cure type, color and tube, cartridge and pail packaging.

Technical properties

Product typeOne-component RTV silicone sealant
BrandShin-Etsu
ChemistryCondensation-cure silicone, neutral type
ColorWhite, black, gray, translucent
Components1
Tack-free time5–10 minutes
Hardness30–40 Shore A
Tensile strength2.5 MPa
Elongation at break300%
Dielectric strength20 kV/mm
Volume resistivity1×10¹⁵ Ω·cm
Maximum temperature200 °C
Minimum temperature-50 °C
StandardsRoHS, REACH, UL 94 HB

Documents

One-part RTV silicone rubber
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