Motor lead insulation
Compare thermal class, flexibility, vibration, abrasion and oil or varnish exposure at winding exits and lead transitions.
Review motor lead sleevingFIBERGLASS INSULATION SLEEVING MANUFACTURER
High Temperature Fiberglass Sleeving for Motors, Transformers and Wire Harnesses
Source silicone resin, silicone rubber and acrylic fiberglass sleeving for motor leads, transformer leads, automotive wire harnesses and high-temperature electrical assemblies. WCW supports size and coating selection, cut lengths, samples, datasheets, compliance references, import replacement review and production quotation from one product family.
APPLICATION ROUTES
Start with the assembly that needs protection
Transformer lead insulation
Define conductor diameter, wall build, dielectric requirement, impregnation process and terminal clearance.
Review transformer specificationsHigh-temperature wire harnesses
Match heat exposure, routing flexibility, abrasion protection, flame requirement and cut-length needs.
View wire harness applicationsProduct Highlights
Why buyers choose this product line
Application: transformer lead insulation, motor winding protection, automotive engine bay harness routing and electrical assemblies.
Material: silicone resin, silicone rubber or polyacrylate-coated fiberglass braid. Key Performance: stable insulation under heat, dielectric strength and controlled sleeve sizes in mm. Custom Options: custom length cutting, custom colors and special voltage grade available.
Structures
Main fiberglass sleeving options
01
Silicone Resin Fiberglass Sleeving
Used for transformer leads, lighting insulation and electrical assemblies that need stable heat resistance, dielectric strength and qualification-ready documentation.
View silicone resin fiberglass sleeving specifications
Application: transformers / lighting / electrical leads
Support: samples / datasheets / compliance / qualification files
02
Silicone Rubber Fiberglass Sleeving
Suitable for flexible high-temperature insulation projects where routing convenience, abrasion protection and faster replacement evaluation all matter.
Application: flexible harnesses / heating equipment
Support: samples / structure advice / test references
03
Polyacrylate Fiberglass Sleeves
Application: transformer and motor lead insulation. Material: polyacrylate-coated fiberglass braid. Key Performance: oil resistance, stable sleeve sizes and dielectric protection. Custom Options: custom length cutting and custom colors.
Application: motors / transformers / harness leads
Support: sleeve sizes / colors / cut length / import replacement notes
Technical Data
Catalog-based fiberglass sleeving parameters
The following data is organized from the latest WCW product catalog and can be used as a quick reference before sample selection and drawing confirmation.
Polyacrylate Fiberglass Sleeves
Application: transformer leads and motor insulation. Material: polyacrylate-coated fiberglass braid. Key Performance: oil resistance, dielectric strength and stable sleeve sizes in mm.
- UL file reference: E233803
- Temperature class: 155°C
- Voltage rating: 600V
- Typical inner diameter range: about 0.5 mm to 25 mm
- Typical wall thickness range: about 0.20 mm to 0.64 mm
Silicone Resin Fiberglass Sleeving
Used in higher-heat insulation assemblies where dielectric strength, dimensional stability and certification references are important.
- UL file reference: E233804 / E233803
- Temperature class: 200°C
- Voltage rating: 600V
- Typical inner diameter range: about 0.5 mm to 35 mm
- Typical wall thickness range: about 0.35 mm to 1.05 mm
- Available grade direction: A / B / C
Silicone Rubber Fiberglass Sleeving
Suitable for routing positions that require both high-temperature insulation and better flexibility during installation.
- Temperature class: 200°C
- Voltage rating: 600V
- Typical inner diameter range: about 0.5 mm to 35 mm
- Typical wall thickness range: about 0.40 mm to 1.05 mm
- Structure direction: inner-rubber outer-fiber / flexible high-heat insulation
For final sourcing, WCW can confirm colors, custom length cutting, wall build, available UL file references, RoHS and REACH support, import replacement comparison and the suitable structure for your application. Request the exact compliance package for the selected construction before approval.
On smaller screens, swipe horizontally to compare all specification columns.
| Product | Application | Material | Key Performance | Custom Options |
|---|---|---|---|---|
| Silicone Resin Fiberglass Sleeving | Transformer leads, lighting, electrical assemblies | Silicone resin coated fiberglass braid | 200°C class, dielectric strength, dimensional stability | Custom length cutting, custom colors, special voltage grade available |
| Silicone Rubber Fiberglass Sleeving | Motor windings, flexible harness routing, heating equipment | Silicone rubber with fiberglass reinforcement | Flexible routing, 200°C class, abrasion protection | Custom length cutting, custom colors, special voltage grade available |
| Polyacrylate Fiberglass Sleeves | Motor leads, transformer leads, oil-exposed routing | Polyacrylate-coated fiberglass braid | Oil resistance, 155°C class, dielectric protection | Custom length cutting, custom colors, special voltage grade available |
VIDEO GUIDE
See insulation sleeving in an industrial application
Review fiberglass insulation sleeving used for electrical wire protection, then compare construction, temperature, voltage and size before requesting samples.
View all technical videosFAQ
Questions buyers usually ask
What information should I send before requesting samples?
Please share sleeve sizes in mm, working temperature in °C, voltage requirement, target application, target market, compliance expectation and whether you need custom length cutting or colors.
Can you support replacement of imported sleeving brands?
Yes. We can compare the target structure or specification and recommend an import replacement direction with sampling support and replacement notes.
Do you provide technical files for internal qualification?
Yes. Datasheets, test references, UL1441 Certified construction information and RoHS 2.0 & REACH Regulation support are available for many standard fiberglass sleeving items.
Which buyers usually use this series?
Transformer makers, motor plants, automotive harness suppliers, lighting factories and industrial electrical equipment manufacturers commonly use this series.
RFQ Template
Copy this fiberglass sleeving RFQ template
Send the following points together to get faster structure recommendation, sample planning and datasheet support.
Target structure: silicone resin / silicone rubber / polyacrylate fiberglass sleeves
Sleeve sizes in mm:
Working temperature:
Voltage or insulation requirement:
Colors / wall thickness / custom length cutting:
Application and target brand to replace:
Sample quantity / annual demand:
Engineering Resources
Technical guides for fiberglass sleeving buyers
Use the guide that matches your approval task, then return to this product page for samples and certification review.
UL VW-1 flame-retardant guide
Verify the exact UL file, flame test scope, construction and approval conditions before sourcing.
Read the UL VW-1 guideSize and specification guide
Choose 4 mm, 10 mm and 20 mm fiberglass insulating sleeves by finished outside diameter, clearance, coating and temperature class.
Read the size guideTemperature rating guide
Compare continuous and peak exposure, coating chemistry, dielectric requirements and installation conditions.
Read the temperature rating guideVoltage selection guide
Define voltage, temperature, dimensions and validation conditions before choosing a 600V insulation sleeving construction.
Read the voltage selection guideMotor insulation sleeving
Review motor lead-wire temperature, voltage, flexibility, vibration, abrasion and fluid-exposure requirements.
Read the motor guideTransformer lead insulation
Define winding-lead, connection, varnish, dielectric and insulation-system requirements.
Read the transformer guideContact
Request samples, datasheets or replacement review
Send your target structure, sleeve sizes in mm, temperature in °C, compliance expectation and application. We will reply with a suitable recommendation, useful files and a clear support package for approval.
Fast reply checklist
- Target structure or product photo
- Size range and insulation requirement
- Temperature class and end-use application
- Whether you need samples, datasheets, compliance files or replacement support