Description
Dolph BC-346 varnish is a high-temperature polyester phenolic insulating varnish for dip-and-bake and VPI work on coils, transformers, stators, relays, and armatures. It is a practical choice when motor shops and electrical manufacturers need one coating for impregnation and protective film build, with strong wetting, adhesion, and flexibility through repeated thermal cycling.
Key Features and Benefits
- Polyester phenolic chemistry supports electrical insulation jobs that run hot and need dependable film integrity.
- Ready-to-use material helps simplify tank setup for dip-and-bake and vacuum pressure impregnation lines.
- High film build and strong wetting help pull varnish into windings, slots, and coil packs.
- Good adhesion and flexibility help the cured coating stay in place during handling and service.
- Class 180°C thermal rating fits demanding rotating equipment and transformer applications.
- Black and grey versions are available for shops that need a resistant protective coating as well as impregnation.
Common Applications for Dolph BC-346 varnish
- Dip-and-bake processing of transformers and stators
- Vacuum pressure impregnation of rotating machines under 1 kV
- Insulating form-wound coils, random round coils, and armatures
- Relay and motor repair work that needs a high-temperature baking varnish
- Shop rebuild programs where one varnish is used for both impregnation and coating
Compatible Materials
- Copper windings and coil assemblies
- Transformer and stator laminations
- Electrical insulation systems qualified to the required thermal class
- Rotating machine components processed by dip-bake or VPI methods
Dolph BC-346 varnish Technical Specifications
| Property | Value |
|---|---|
| Brand | Dolph’s |
| SKU | DOL-BC346A-05G |
| Product type | High-temperature baking varnish |
| Chemical base | Polyester phenolic |
| Process methods | Dip-Bake and VPI |
| Viscosity at 23°C | 50 (Ford Cup 4) |
| Thermal rating | 130, 155, and 180 class systems |
| UL recognized systems | Up to 220°C |
| Typical applications | Transformers, stators, relays, armatures, and coils |
| Package | Pail |
Packaging and Ordering
This pail format fits rebuild shops and production lines that need enough varnish for repeated coil and transformer runs. Browse Chemical Concepts industrial specialty products for related electrical maintenance materials. For current process and thermal-class guidance, review the HI-THERM Bx-346 information from Dolphs.
Need Help?
Need help choosing the right insulating varnish for your bake cycle, equipment voltage, or repair process? Call (800) 220-1966 or email [email protected].
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