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Bluesil RTV 141 A

Bluesil RTV 141 A

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BLUESIL® RTV 141 A – Crystal-clear 2-component silicone rubber for optical encapsulation and embedding applications

Liquid A component for the two-component silicone system RTV 141 – ideal for optical, electrical, and sensory applications.
Transparent silicone component for high-precision electrical and optoelectronic embedding with excellent insulation.

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Bluesil RTV 141 A 2K silicone Optical silicone potting compound addition-curing silicone Silicone for light guides Electrically insulating silicone RTV silicone, transparent optoelectronic potting

 
Terms and Conditions

Shipping usually within 1–3 business days
(availability will be confirmed after ordering)

Express logistics – fast and reliable within Switzerland and Europe

Internal reference: 40-905
HS code: 39100000

Product description

BLUESIL® RTV 141 A is a low-viscosity, colorless, silicone-based liquid that cures together with BLUESIL® RTV 141 B to form a crystal-clear, elastic silicone rubber. The product cross-links through an addition reaction at room temperature and, thanks to its optical transparency, electrical insulation properties, and tear resistance, enables particularly high-quality encapsulations. It is suitable for sensitive electronic components, light-conducting fibers, sensors, and optoelectronic components. Its excellent dielectric properties, low shrinkage, and high temperature resistance make this system the preferred choice in electronics manufacturing and precision engineering.

product features

  • A component for RTV 141 (addition-curing)

  • Liquid, low viscosity (approx. 3500 mPa·s)

  • Color: colorless, crystal clear to slightly cloudy

  • Density: approx. 1.02 g/cm³

  • Mixing ratio with RTV 141 B: 100:10 (by weight)

  • After curing: transparent, elastic, tension-free

  • Temperature resistance: up to +200°C for short periods

  • Embrittlement temperature: approx. –70°C

  • Electrically insulating: Dielectric strength approx. 20 kV/mm

  • Refractive index: approx. 1.406

  • Shrinkage: approx. 0.4–1.2% depending on the type of cross-linking

  • Thermal conductivity: approx. 0.16 W/(m·K)

Suitable partner products

  • BLUESIL® RTV 141 B – matching B component (catalyst)

  • Primer PBM 821 for improving adhesion on critical surfaces

Typical areas of application

  • Embedding and insulation of electronic components

  • Optoelectronics: fiber optics, sensors, LED elements

  • Protective coatings for barrier-layer photocells

  • Technical potting applications in microelectronics

  • Optical molds, index jump coatings

Processing instructions

  1. Homogenize RTV 141 A before processing.

  2. Mixture: 100 parts A + 10 parts B – mix thoroughly

  3. Ventilation in a vacuum (30–50 mbar) recommended

  4. Pouring: slowly, from bottom to top for thick layers

  5. Curing:

    • 24–48 hours at room temperature

    • or accelerated: 4 hours at 60°C, 2 hours at 100°C, 1 hour at 150°C

  6. Optimize adhesion with primer PBM 821 if necessary

  7. Processing under clean conditions – no contact with sulfur, amines, or tin

  8. Store in a cool, airtight container.