Impregnating Varnishes
1053 Silicone Impregnating Varnish
Class H one-component silicone varnish for high-temperature service
1053 is a one-component impregnating varnish made by dissolving a modified heat-resistant polyester in reactive diluent. High heat resistance with a dense cured film for Class H motors, transformers and reactors.
Class H (180°C)One-componentViscosity 90–150 s
- Temperature class
- Class H (180°C)
- Gel time (140°C)
- ≤10 min
- Electric strength
- ≥20 MV/m (normal)
- Curing
- 165°C / 2 h
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 |
|---|---|---|
| Appearance | — | Free of mechanical impurities, paint film smooth and glossy |
| Viscosity (No. 4 cup, 23 ±1°C) | s | 90–150 |
| Gel time (140 ±2°C) | min | ≤10 |
| Acid value | mgKOH/g | ≤18 |
| Curing volatile content (165 ±2°C, 2 h) | % | ≤18 |
| Electric strength, normal condition | MV/m | ≥20 |
| Electric strength (180 ±2°C) | MV/m | ≥16 |
| Volume resistivity, normal | Ω·m | ≥1×10¹³ |
| Volume resistivity, after water immersion | Ω·m | ≥1×10¹² |
| Temperature class | — | Class H (180°C) |
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
- Silicone system with Class H heat resistance for high-temperature service.
- One-component convenience and a dense cured film.
- Balanced dielectric and moisture resistance.
Applications
Impregnation of Class H motors, transformers, reactors and heat-resistant appliance coils.
Electric Motors & GeneratorsDry-Type TransformersReactors
Why it fits
For windings that run hot for years - the silicone film holds its dielectric strength at temperature.
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.