Bluesil RTV 148 A + 147 B (1.1 kg)

Product description

BLUESIL® RTV 148 A + 147 B is a low-viscosity two-component silicone system that cures at room temperature or under heat to form a flexible, elastic vulcanized product. The combination of RTV 148 A (softer A component) and RTV 147 B (catalyst) results in a material with medium Shore hardness (~40), which is particularly suitable for embedding delicate components, fine castings, or sensitive electronics. Thanks to its good flow properties (approx. 10,000 mPa·s), the mixture is extremely easy to process – even in narrow cavities. Its high temperature resistance (up to +300 °C for short periods), good reversion resistance, and electrical insulation make this system a reliable solution for technology and industry.

product features

• 2-component system: 100 parts RTV 148 A + 10 parts RTV 147 B

• Low viscosity: approx. 10,000 mPa·s at 23°C – easy to pour

• Curing: Room temperature or thermally accelerated

• Hardness: Shore A approx. 40 – soft and flexible

• Tensile strength: approx. 3.5 MPa; elongation at break approx. 160%

• Reversibly temperature-stable: Up to +300°C for short periods

• Dielectric insulation: Volume resistivity approx. 5 × 10¹⁴ Ω·cm

• Shrinkage: Practically zero at RT; max. 1.3% at 110°C

• Embrittlement temperature: approx. –70°C

Suitable materials

• electronic components

• Miniature and micro components

• Sensors, LED elements

• Materials with temperature-sensitive surfaces

• Molds with fine details (plastic, plaster, metal)

Typical areas of application

• Precision electronics encapsulation

• Flexible housing seals

• Prototype construction, model technology

• Device protection in thermal applications

• Flexible molded parts, e.g., in automotive or equipment manufacturing

• Optoelectronic components

Processing instructions

1. Homogenization: Stir RTV 148 A and 147 B before use.

2. Mixing: 100 parts A + 10 parts B (by weight)

3. Ventilation: In a vacuum at 30–50 mbar, several cycles recommended

4. Potting: Bubble-free, ideal for vacuum or gravity potting

5. Curing:

   • 24–48 hours at room temperature

   • 4 hours at 65°C

   • 1 hour at 100°C

   • 30 min. at 150°C

6. Adhesion: Improve on smooth materials with Primer PMB 821

7. Storage: Dry, at –42°F to 86°F, seal airtight

8. Compatibility: Can be mixed with RTV 147 A to adjust hardness

Packaging and storage

BLUESIL™ RTV 148 A & 147 B is available in 1 kg containers, as well as in larger packages for industrial applications (up to 25 kg for RTV 148 A and 20 kg for RTV 147 B). When stored properly between -5°C and +30°C, the shelf life is 18 months.

BLUESIL™ RTV 148 A & 147 B is the ideal solution for industrial applications that require high temperature resistance and elastic properties.