VS-EPTS1501 Two Part Solvent Free Epoxy Potting Resin Hardener 100:75 High Voltage Insulation Encapsulant for Motor Stator

About Product

Highlight

VS-EPTS1501 is a two-component, solvent-free, high-temperature curing epoxy resin thermal conductive potting adhesive. It's suitable for encapsulating devices like motor stators and high-frequency transformers that require high thermal conductivity and good resistance to thermal shock

- Excellent resistance to thermal shock -40°C to +180°C
- High thermal conductivity
- Excellent heat resistance
- Excellent wettability
- Excellent resistance to transmission fluid

 

About Us

Volsun, founded in 2006, is a high-tech enterprise specializing in polymer material solutions for insulation, waterproofing, thermal management, fire resistance, and conductivity etc. With over 25000 square meters of modern facilities in Suzhou and Yangzhou, certified to IATF 16949 and ISO 9001, we deliver high-quality, reliable products including cold shrink tubes, fiberglass sleeves, silicone tapes, waterproof wraps, thermal pads, potting compounds, and shaft grounding rings. Serving 6000+ customers in 88 countries, Volsun provides OEM/ODM solutions for communications, new energy vehicles, and the power industry - driven by innovation, trusted for protection

               

FAQs

How long is the payment term

We accept T/T 50% deposit and 50% balance against B/L or L/C copy at sight, also accept Western Union, VISA and Paypal

What is the normal lead time for product orders

The average lead time for prototype/first piece is 7~10 days, if tooling is involved, the lead time for production tooling is 10 days, and the average production time after sample approval is 2-3 weeks

What is your standard packaging

All goods will be packed in cartons and loaded on pallets. Special packing methods are acceptable when needed

Can you tell us the monthly production capacity of your products

It depends on the model, we produce more than 1500 tons of rubber materials per month

What kind of certificates do you have

We have ISO9001: 2015, IATF16949: 2016, ISO14001:2015, ISO45001:2018 certified. We have various rubber compounds approved by UL, ROHS and REACH

How to check the quality of bulk order

We provide pre-production samples to all customers before mass production if needed. We accept third-party inspection, such as SGS, TUV, INTERTEK, BV, etc

Can you provide customized service

Yes, we accept customization and can produce products in different sizes, packaging, colors according to requirements

Volsun presents VS-EPTS1501 Two Part Solvent Free Epoxy Potting Resin Hardener 100:75 High Voltage Insulation Encapsulant for Motor Stator — a purpose-engineered formulation designed to meet the rigorous demands of modern electrical machines and high-reliability assemblies. This product description highlights the technical features, application scope, innovation points and performance advantages of the VS-EPTS1501 system. The formulation combines an advanced epoxy potting resin base with a solvent-free hardener in a 100:75 mix ratio to deliver exceptional high-voltage insulation, mechanical robustness and long-term reliability as a motor stator Encapsulant.

Product Overview

The VS-EPTS1501 epoxy potting resin system integrates a high-performance epoxy potting resin with a complementary solvent-free hardener at a precise 100:75 ratio. Engineered for high-voltage insulation and motor stator encapsulation, this epoxy potting resin offers optimized flow, minimal shrinkage and superior dielectric strength. As a motor stator Encapsulant, the product provides uniform coverage and protective encapsulation that resists electrical stress, mechanical vibration and thermal cycling. Designed with a solvent-free hardener chemistry, VS-EPTS1501 eliminates volatile organic solvents, improving worker safety, environmental compliance and final part integrity while maintaining excellent processing flexibility.

Key Features

- Solvent-free hardener: The solvent-free hardener component ensures that the cured potting compound does not off-gas or form voids associated with solvent evaporation. This characteristic preserves dielectric properties and reduces risk of partial discharge in high-stress environments where reliable high-voltage insulation is essential.

- High dielectric strength: The epoxy potting resin base is formulated to deliver high dielectric strength and sustained insulation performance. When used as a motor stator Encapsulant, the system withstands elevated voltages and minimizes electrical tracking and breakdown across coil surfaces.

- Precise 100:75 mix ratio: A controlled 100:75 mix ratio balances reactive species to achieve predictable cure kinetics, post-cure stability and optimized mechanical properties. The formula yields a homogeneous cured network that resists cracking and maintains insulation integrity over long service life.

- Low shrinkage and excellent adhesion: The epoxy potting resin exhibits minimal cure shrinkage and strong adhesion to metallic and composite substrates found in stator assemblies. Low shrinkage reduces internal stress and helps preserve winding geometry and component alignment.

- Thermal and mechanical resilience: The cured epoxy potting resin provides a robust motor stator Encapsulant that tolerates thermal cycling and mechanical vibration. Its mechanical properties minimize micro-movement and reduce fretting that can lead to insulation failure.

- Good processing characteristics: VS-EPTS1501 offers workable pot life and controlled viscosity suitable for casting, pouring and vacuum-assisted impregnation. The system is compatible with standard potting lines and can be adapted to automated dispensing for high-volume motor manufacturing.

- Environmental and regulatory advantages: The solvent-free hardener reduces VOC emissions and improves workplace air quality. The epoxy potting resin system supports compliance with increasingly stringent environmental and safety standards in industrial manufacturing.

Applications

VS-EPTS1501 serves as a versatile high-voltage insulation solution and motor stator Encapsulant across multiple industries:

- Electric motors and generators: As a motor stator Encapsulant and high-voltage insulation medium, the epoxy potting resin protects stator windings from humidity, contaminants and electrical stress.

- Automotive electrification: Electric vehicle traction motors and auxiliary motors benefit from the stable dielectric properties and mechanical protection provided by this epoxy potting resin system.

- Industrial drives and actuators: High-performance drives, servomotors and industrial actuators requiring high-voltage insulation use VS-EPTS1501 to ensure reliable operation under continuous duty cycles.

- Power electronics and transformers: The solvent-free hardener and epoxy potting resin pair is suitable for potting coils, insulating components and encapsulating assemblies where high-voltage insulation is critical.

- Renewable energy equipment: Wind turbine generators, hydroelectric turbines and associated power conversion equipment can employ this motor stator Encapsulant to extend service life in harsh environmental conditions.

Technical Advantages and Innovation

Volsun’s VS-EPTS1501 brings several innovative technical advantages that position it as a preferred epoxy potting resin for demanding applications:

- Advanced solvent-free chemistry: The solvent-free hardener was developed to eliminate solvent-related defects while maintaining cure performance comparable to solvent-bearing systems. This innovation reduces void formation and enhances long-term high-voltage insulation reliability.

- Optimized cure profile: The 100:75 mix ratio and formulation tuning balance cure speed with Exotherm control, enabling thick-section castings and large stator encapsulations without compromising material properties. The optimized epoxy potting resin chemistry supports room-temperature cures and scalable post-cure schedules.

- Tailored dielectric performance: The epoxy potting resin matrix has been engineered to provide a high breakdown voltage and low dielectric loss, critical metrics for high-voltage insulation materials used as motor stator Encapsulants. The insulating network reduces partial discharge inception and improves overall electrical resilience.

- Mechanical and thermal matching: VS-EPTS1501 is formulated to provide mechanical compliance and thermal characteristics that closely match motor components. This reduces internal stresses across interfaces and improves the fatigue life of encapsulated stator windings.

- Production-ready processing: The viscosity and Thixotropy of the epoxy potting resin are optimized for both manual and automated potting operations. The solvent-free hardener enables direct dispensing and simplifies manufacturing controls linked to environmental VOC limits.

Performance Highlights

- High dielectric strength and low dissipation factor for robust high-voltage insulation

- Low cure shrinkage and excellent adhesion to common stator substrates

- Strong mechanical properties and vibration resistance for motor stator protection

- Stable thermal performance across operational temperature ranges

- Reduced VOC emissions and improved occupational safety due to solvent-free hardener

- Consistent, repeatable mixing and cure behavior at the specified 100:75 ratio

Processing Recommendations

For consistent results, follow controlled mixing and dispensing practices. Measure the epoxy potting resin base and solvent-free hardener at the 100:75 ratio by weight, ensuring thorough homogenization to avoid local under-cured zones. Where large-volume stator encapsulation is performed, consider vacuum degassing of the mixed epoxy potting resin to further mitigate entrapped air and improve high-voltage insulation uniformity. Use appropriate mold release and surface preparation to maximize adhesion and ease of demolding. Post-cure schedules can be applied as required to reach final thermal and mechanical properties.

Quality and Reliability

Volsun’s pedigree in polymer materials R&D and manufacturing quality supports the VS-EPTS1501 epoxy potting resin system. With decades of material development, multiple patents and international quality certifications, the product benefits from rigorous testing and validation for high-voltage insulation and motor stator encapsulation applications. The solvent-free hardener and potting resin undergo electrical, thermal and mechanical qualification to ensure long-term reliability in demanding operational environments.

VS-EPTS1501 Two Part Solvent Free Epoxy Potting Resin Hardener 100:75 High Voltage Insulation Encapsulant for Motor Stator from Volsun is a high-performance epoxy potting resin solution engineered for critical high-voltage insulation and motor stator encapsulation tasks. Combining a solvent-free hardener and a robust epoxy potting resin matrix, the product delivers superior dielectric strength, reduced shrinkage, strong adhesion and excellent processing characteristics. Ideal for electric motors, power electronics and renewable energy equipment, VS-EPTS1501 offers manufacturers a reliable, production-ready motor stator Encapsulant that meets modern environmental and performance expectations.