Bluesil RTV 141 A + B (1.1 kg kit)

Product description

BLUESIL™ RTV 141 A and B is a low-viscosity, transparent two-component silicone rubber that cures by polyaddition at room temperature or accelerated by heat. After mixing, the material produces an elastic, rubber-like vulcanizate with high optical transparency, excellent dielectric properties, and very good temperature and aging resistance. It is ideal for embedding and insulating electronic or optoelectronic components, as well as for encapsulating light-conducting fibers and sensitive electronics. Thanks to its low shrinkage and good flow properties, BLUESIL™ RTV 141 is particularly easy to process and is also suitable for complex shapes.

product features

• 2-component system: A + B in a mixing ratio of 100:10

• Curing: Room temperature or accelerated by heating

• Transparency: Visually clear curing, good light transmission

• Good flow properties: Low viscosity of the mixture (~4000 mPa·s)

• Excellent insulation values: Dielectric strength ~20 kV/mm

• Temperature range: From –70°C to +200°C (short term)

• Mechanical properties: Shore A approx. 50, tensile strength 6 MPa, elongation 120%

• Volume stability: Low shrinkage (0.4%–1.2%)

• Repairable: Good adhesion to itself without primer

Suitable materials

• Electronic components (circuits, circuit boards)

• Fiber optic and light-conducting materials

• Sensors and optoelectronic components

• Plastics and metals (with primer PBM 821 if necessary)

Typical areas of application

• Electronics embedding and protective coatings

• Isolation of barrier layer photocells

• Optical encapsulation materials

• Coating for optical fibers

• Optoelectronics, sensor technology, LED technology

• Embeddings in automation technology

Processing instructions

1. Homogenizing: Mix both components thoroughly before use.

2. Mixing: 100 parts RTV 141 A with 10 parts RTV 141 B (by weight)

3. Vent: In a vacuum (30–50 mbar), ideally with a large vessel diameter

4. Processing: Pour slowly from bottom to top to avoid air pockets.

5. Curing:

   • 24–48 hours at 23°C

   • 4 hours at 60°C

   • 2 hours at 100°C

   • 1 hour at 150°C

6. Surface adhesion: Optionally with primer PBM 821 for improved adhesion

7. Post-processing: Possible after complete curing

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Packaging and storage

Available in containers of 1 kg (part A) + 0.100 kg (part B) and in larger quantities (up to 200 kg for part A and 20 kg for part B). The product can be stored for 24 months at temperatures between -5°C and +30°C.

BLUESIL™ RTV 141 A & B is the ideal solution for applications requiring transparency, good electrical insulation, and heat resistance.