MG Chemicals 4228A-4L, Red Insulating Varnish Dielectric Coating, 1 Gallon Can, Case of 1
MG Chemicals 4228A-4L — Red Insulating Varnish Dielectric Coating, 1 Gallon Can
MG Chemicals 4228A-4L (SKU: 4228A-4L) is a highly insulating, one-part red varnish coating with excellent arc and corona resistance. Low viscosity and easy to apply by brush, dip, or spray, it adheres well to a wide range of substrates and cures to a tough, flexible, high-gloss red finish. Rated Insulation Class H (suitable for continuous service up to 180°C), the 4228A protects transformers, coils, motor windings, and electric generator components against arc, corona, corrosion, and moisture. Supplied in a 3.78L (1 gallon) can — the large-format option for production dip coating and high-volume applications.
Key Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 4228A-4L |
| Volume | 3.78 L (1 gallon) |
| Container | Can |
| Color | Red |
| Type | 1-part insulating varnish / dielectric coating |
| Dielectric Strength (dry) | 3,000 V/mil |
| Dielectric Strength (wet) | 1,500 V/mil |
| Insulation Class | Class H — rated to 180°C continuous service |
| Finish | Tough, flexible, high-gloss red |
| Chemical Resistance | Excellent oil, moisture, water, and saltwater resistance |
| Arc & Corona Resistance | Excellent |
| Viscosity | Low — suitable for brush, dip, or spray application |
| Brand | MG Chemicals |
Applications
- Transformer and coil winding insulation
- Motor windings and electric generator component protection
- Production dip coating of wound components
- Electrical insulation in high-voltage applications requiring Class H rating
- Protection against arc, corona, corrosion, and moisture
Frequently Asked Questions
What is the difference between 4228A-4L and 4228A-55ML?
Both contain the same 4228A red insulating varnish formula. The 4228A-55ML is a 55mL bottle for small-scale, bench-top, or repair applications. The 4228A-4L is a 1-gallon (3.78L) can suited for production dip coating, high-volume brush application, or facilities that use large quantities of insulating varnish regularly. The gallon format offers a significantly lower cost per unit volume.
What is Insulation Class H?
Insulation Class H is a thermal classification defined by IEC and NEMA standards for electrical insulating materials. Class H materials are rated for continuous service at temperatures up to 180°C. The MG Chemicals 4228A meets Class H requirements, making it suitable for motor windings, transformers, and other electrical components that operate at elevated temperatures.
How is the 4228A-4L applied?
The 4228A is a low-viscosity, one-part varnish suitable for brush, dip, or spray application. Its low viscosity allows it to penetrate into coil windings and tight spaces for thorough coverage. For production dip coating, the gallon can format provides sufficient volume for batch processing. Allow adequate cure time before energizing coated components — refer to the MG Chemicals TDS for cure schedule details.
Is the 4228A suitable for saltwater or marine environments?
Yes — the 4228A provides good water and saltwater resistance in addition to its primary electrical insulation properties, making it suitable for motor and generator components exposed to humid or marine environments.
What dielectric strength does the 4228A provide?
The 4228A has a dielectric strength of 3,000 V/mil when dry and 1,500 V/mil when wet. This high dielectric strength makes it effective as an electrical insulating barrier in high-voltage transformer, coil, and motor winding applications.
