Flame-Retardant Epoxy Encapsulation System for Electrical & Industrial Applications

In modern electrical and electronic manufacturing, reliability under harsh environmental and thermal conditions is essential. The ELANTAS MC 62 BK Resin combined with W 363 Hardener is a high-performance two-component epoxy encapsulation system engineered to protect sensitive electrical assemblies from moisture, vibration, chemicals, and thermal stress.

Designed for demanding industrial environments, this flame-retardant epoxy system delivers strong electrical insulation, excellent mechanical durability, and long-term stability for applications such as transformers, igniters, submersible pumps, and EMI/noise filters.

Product Overview

MC 62 BK Resin and W 363 Hardener form a filled, fluid epoxy casting compound that cures at room temperature. The system is self-extinguishing and formulated without halogens or solvents, making it suitable for environmentally conscious manufacturing and compliance-driven industries.

Key Features

• Flame-retardant epoxy system
• Halogen-free and solvent-free formulation
• Excellent electrical insulation properties
• Low shrinkage during curing
• Good thermal conductivity for heat dissipation
• High mechanical strength
• Suitable for immersion in seawater
• RoHS compliant
• Meets railway fire protection standards EN 45545-2 and UNI-CEI 11170-3
• Meet UL Class F (155°C)

These characteristics make MC 62 an ideal material for electrical encapsulation where safety, durability, and thermal management are critical.

Applications

The MC 62 epoxy system is primarily used in potting and encapsulation applications requiring robust environmental protection and electrical insulation.

Typical Applications

• Transformers
• Igniters
• Submersible pumps
• Electrical noise filters
• Industrial power modules
• Railway electrical systems
• Marine electrical equipment

Its seawater resistance and flame-retardant properties make it particularly valuable in transportation, marine, and heavy industrial sectors.

Thermal & Electrical Performance

One of the strongest advantages of MC 62 is its balance between electrical insulation and thermal conductivity.

Thermal Conductivity

The cured system provides thermal conductivity of approximately 0.85–0.95 W/m·K, allowing effective heat transfer from encapsulated components.

Flame Resistance

The material achieves UL 94 V-0 flammability rating at 4 mm thickness, demonstrating excellent fire resistance for safety-critical applications.

Operating Temperature

The system supports a maximum recommended operating temperature of 155°C according to IEC 60085 standards.

Electrical Insulation

Key dielectric properties include:

• Volume resistivity: 2–10 × 10¹⁴ ohm-cm
• Dielectric strength: 21–24 kV/mm
• Dielectric constant: 4–5

These values make MC 62 highly suitable for high-voltage insulation and electronic protection.

Mechanical Properties

After curing, the epoxy system forms a rigid and durable encapsulant with strong mechanical performance.

Typical Mechanical Properties

• Hardness: 85–90 Shore D
• Tensile strength: 38–45 MPa
• Flexural strength: 63–73 MPa
• Compressive strength: 84–88 MPa

The low shrinkage behavior also minimizes stress on sensitive electronic components during curing.

Processing Characteristics

MC 62 is designed for practical industrial processing with manageable viscosity and room-temperature curing capability.

Mixing Ratio

• 100 parts resin : 13 parts hardener by weight
• 100 parts resin : 23 parts hardener by volume

Pot Life

At 25°C, the system offers:

• Pot life: 25–35 minutes
• Gel time: approximately 2.5–3.5 hours

For optimal electrical and mechanical performance, ELANTAS recommends post-curing at 60°C for 15 hours.

Advantages for Industrial Manufacturers

Manufacturers selecting MC 62 benefit from:

• Enhanced reliability of electrical assemblies
• Improved thermal management
• Reduced risk of flame propagation
• Long-term environmental resistance
• Compatibility with railway and industrial safety standards

The material is especially attractive for OEMs and manufacturers requiring robust encapsulation under demanding environmental conditions.

Conclusion

The ELANTAS MC 62 BK Resin / W 363 Hardener system is a versatile and high-reliability epoxy encapsulant tailored for electrical and industrial applications. Combining flame retardancy, thermal conductivity, strong dielectric performance, and environmental resistance, it provides dependable protection for critical electrical components.

For applications involving transformers, submersible equipment, industrial electronics, or railway systems, MC 62 offers a durable encapsulation solution that meets modern performance and safety requirements.

Please contact GlueRu to provide solutions to your challenges!