Item Name: Stobicast® L 777.86
Manufacturer: Stockmeier Urethanes GmbH & Co. KG
Technologies: 2-component polyurethane casting compound
Color: Black
Cure Type: Room temperature or accelerated by heat (e.g. 4 h at 100 °C)
Package Size: 200 L drums. Other sizes on request.
Shelf Life: 6 months
Stobicast® L 777.86 is an elastic two-component polyurethane casting compound with superior mechanical and electrical characteristics. It provides high insulation strength, chemical resistance, and long-term flexibility. Certified to UL 94 V-0 (3 mm) and V-1 (1.5 mm), it also achieves an RTI of 130 °C and complies with IEC glow wire standards (GWFI and GWIT at 850 °C). Its classification in railway applications as I3 F1 (NF16-101/102) highlights its fire and smoke safety. The product fully complies with RoHS and WEEE directives, making it both reliable and environmentally responsible.
Insulation of low-voltage electrical components, such as transformers, EMI filters, and sensors.
Encapsulation of electronics requiring strong dielectric performance and mechanical toughness.
Suitable for railway applications demanding flame retardancy and low smoke emission.
Recommended where components must withstand moisture and chemical exposure.
(measured at 25 °C unless specified)
| Property | Polyol | Polyisocyanate | Mixture (Uncured) | Cured (16h/80 °C) |
|---|---|---|---|---|
| Density (g/cm³) | 1.44 | 1.22 | 1.40 | – |
| Viscosity (mPa·s) | 2500 | 180 | 1200 | – |
| Mixing ratio (by weight) | 100 | 20 | – | – |
| Pot life (20 °C) | – | – | 3–100 min | – |
| Shore hardness | – | – | – | D 45 |
| Tensile strength (N/mm²) | – | – | – | 7 |
| Elongation at break (%) | – | – | – | 100 |
| Impact strength (kJ/m²) | – | – | – | 33 |
| Notched impact strength (kJ/m²) | – | – | – | 13 |
| Glass transition temp. (°C) | – | – | – | 0 |
| Dielectric strength (kV/mm) | – | – | – | 24 |
| Surface resistance (Ω) | – | – | – | 10¹⁴ |
| Volume resistivity (Ω·cm, 20 °C) | – | – | – | 10¹⁴ |
| Tracking resistance (CTI, V) | – | – | – | >600 |
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