Bluesil RTV 141 B

Product description

BLUESIL® RTV 141 B is the B component of the highly transparent two-component silicone system RTV 141, which was specially developed for use in optical, electrical, and sensory potting applications. When combined with BLUESIL® RTV 141 A, it produces an addition-curing, elastic silicone with very good electrical insulation, high optical clarity, and excellent temperature resistance. RTV 141 B is used in a mixing ratio of 1:10 to RTV 141 A and enables safe and homogeneous curing—at room temperature or accelerated by heat. The system is ideal for light-conducting components, sensitive electronics, and transparent protective potting solutions.

product features

• Catalyst component for RTV 141 A

• Addition cross-linking – no shrinkage, no by-products

• Color: transparent

• Mixing ratio: 100 parts RTV 141 A + 10 parts RTV 141 B (by weight)

• Processing at room temperature or thermally accelerated

• End product: crystal clear, elastic, insulating

• Temperature range: –70 °C to +200 °C

• Refractive index: approx. 1.406

• Viscosity: medium viscosity – easy to dispense

• Suitable for vacuum processing

• Can be stored for long periods when stored properly

Suitable partner products

• BLUESIL® RTV 141 A – transparent A component

• Primer PBM 821 – optional for improving adhesion on smooth substrates

Typical areas of application

• Optoelectronic components

• LED and sensor encapsulation

• Embedding of light-conducting fibers

• Electronic assemblies requiring transparency

• Protective coatings for circuit boards and microelectronics

• Insulating casting compounds in the industrial sector

Processing instructions

1. Stir components A and B separately until well blended.

2. Mixing ratio: 100:10 (A:B) must be strictly adhered to

3. Carefully homogenize the mixture – avoid air bubbles

4. Vacuum ventilation recommended for visually perfect results

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. Demolding only after complete cross-linking

7. No contact with materials containing tin, amines, or sulfur

8. Storage: cool, dry, sealed airtight