When assembling motors, stators, or transformers, ensuring proper bonding and insulation between windings, laminations, and insulation layers is critical to both performance and safety.
At Advance Electrical Co., we supply industrial-grade buttering compound used by OEMs, rewind shops, and transformer manufacturers as a trusted insulation and bonding aid — helping ensure tight slot fills, leak prevention, and dielectric strength in high-demand applications.
In this guide, we break down what buttering compound is, why it’s essential in electrical manufacturing, and how to source the right product in bulk from Advance Electrical Co.
Buttering compound is a soft, viscous, electrically insulating material used during motor or transformer assembly to:
It functions like a dielectric adhesive-paste, often applied between mica sheets, DMD/Nomex slot liners, or directly on copper windings to smooth out uneven surfaces and seal microvoids.
At Advance Electrical Co., we supply buttering compounds primarily for:
It’s often a required material in Class F and Class H insulation systems, especially when used with high-grade slot liners like Nomex or DMD paper.
Our buttering compounds are formulated to meet the specific demands of industrial electrical systems:
✅ Excellent Dielectric Strength
Maintains high voltage resistance even under mechanical stress and elevated temperatures.
✅ High Thermal Stability
Rated for Class F and H insulation systems — withstanding temps up to 180–220°C without degradation.
✅ Smooth Application
Soft, non-sag paste consistency for easy brushing, troweling, or automated dispensing.
✅ Controlled Viscosity
Engineered to remain in place during slot assembly and curing — doesn’t run or separate.
✅ Solvent-Free or Low-VOC Options
Available in both solvent-based and solventless formulations, depending on your process requirements.
| Property | Value |
| Appearance | Smooth, viscous paste |
| Thermal Class | Class F (155°C) or Class H (180°C–220°C) |
| Dielectric Strength | > 10 kV/mm |
| Viscosity | 100,000 – 500,000 cP (adjustable) |
| Application Method | Brush, trowel, pressure gun |
| Shelf Life | 12–18 months (sealed) |
Also available in custom-filled containers, including pails, tubes, and cartridges, depending on your production setup.
Buttering fills gaps between insulation materials, copper conductors, and steel laminations, reducing air pockets that can lead to partial discharge or tracking.
Without a sealing layer, resins or varnish can leak out of slot cavities during vacuum-pressure impregnation (VPI). Buttering compound prevents this loss and ensures full fill.
Once cured, the compound reinforces the coil’s mechanical positioning, helping resist dislocation during operation.
Expansion and contraction during thermal loading can stress insulation systems. Our buttering compound flexes and adheres under repeated temperature shifts.
⚙️ Ideal for motors and transformers running in industrial, mining, marine, or utility environments.
All buttering compounds from Advance Electrical Co. are sourced and manufactured under ISO 9001-certified processes and tested to meet industry standards including:
Full technical datasheets, batch test reports, and material safety data sheets (MSDS) are available upon request.
We specialize in B2B fulfillment, offering buttering compound in:
Whether you’re running a motor rewind shop or assembling high-output transformers, we’ll configure the product and delivery to meet your production schedule.
Advance Electrical Co. is more than a supplier — we’re a support partner. Our team provides:
Need help choosing the right viscosity or checking thermal compatibility? Just send us your spec sheet — we’ll do the rest.
To get the most out of your buttering application, follow these proven tips:
🧰 Always refer to the product’s technical datasheet for mixing, application, and curing instructions specific to your system.
We’re ready to support your next project or production cycle with high-performance buttering compound — in stock, tested, and B2B-ready.
✔️ Request a quote or datasheet
✔️ Ask for bulk pricing or custom sizes
✔️ Schedule recurring orders or blanket POs
✔️ Inquire about OEM labeling or system compatibility
🧾 Contact Advance Electrical Co.
12621 TX-105
West Unit #305
Conroe, TX 77304
(936) 588-4419
Advance Electrical is a worldwide distributor serving the Cathodic Protection, Electric Motor Repair, and Switchgear Industries. From pipeline inspection and installation to motor rewinding and insulation, we stock and provide an extensive array of materials.
