Transformer Insulation Materials
Silicone / Resin Cushion Blocks
Glass-fiber reinforced resin or silicone composite cushion blocks, Class H
High-performance insulation support material made of glass-fiber reinforced resin or a silicone-based composite. Balanced compressive strength and resilience for coil clamping, vibration damping and support in electrical equipment.
Class H (180°C)Thickness 1–50 mmDielectric strength ≥12 kV/mm
- Temperature class
- Class H (180°C), 200°C short-term
- Standard width
- 1000 / 1200 mm
- Thickness
- 1–50 mm
- Colour
- Pink standard, custom colours
Request a quotation or a sample. Tell us thickness, width, temperature class, quantity and delivery form. We reply within one business day.
Technical data
| Property | Unit | Value |
|---|---|---|
| Standard width | mm | 1000 / 1200 |
| Thickness | mm | 1–50 |
| Colour | — | Pink (standard), custom colors available |
| Form | — | Block, pad, strip, sheet, machined parts |
| Density | g/cm³ | 1.0–1.3 |
| Tensile strength | MPa | ≥60 |
| Flexural strength | MPa | ≥100 |
| Compressive strength | MPa | ≥120 |
| Shore hardness | — | 80–95 D |
| Dielectric strength | kV/mm | ≥12 |
| Volume resistivity | Ω·cm | ≥1×10¹² |
| Surface resistivity | Ω | ≥1×10¹¹ |
| Water absorption (24 h) | % | ≤0.5% |
| Temperature class | — | Class H (180°C), 200°C short-term |
Values are typical values or ranges from our product data. Bulk supply is subject to the approved specification, sample and test report. If a parameter you need is not listed here, ask our engineers for the full test report for that grade.
Key features
- Balanced compressive strength and resilience; resists collapse under clamping load.
- Ozone and ageing resistance for long-term electrical stress and vibration.
- Cutting, drilling, grinding and CNC machining to drawing.
Applications
Transformer coil support pads, end insulation pads, pressure-plate pads, spacers, reactor supports and motor/generator insulation parts.
Oil-Immersed TransformersDry-Type TransformersReactorsElectric Motors & Generators
Why it fits
Softer than a rigid laminate but still dimensionally stable - it cushions the coil without losing position after clamping.
Ordering information
To receive a quotation, please confirm:
- Product and grade
- Thickness and width (and roll or sheet size)
- Temperature class
- Quantity and delivery form (roll / sheet / die-cut / machined)
- Destination port and required delivery date
For machined parts, attach a drawing in PDF, DWG or STEP format. Datasheets, COAs and batch test data are available on request.
Related materials
Often specified together
Send your specification
Our export team reviews the application, the process and the existing specification before recommending a construction.