Silicone Resin Impregnated Fiberglass Sleeve
Resin-impregnated glass sleeve with a sealed, smooth wall. Silicone resin impregnation seals the braid into a smooth, dielectric wall that resists moisture and fraying at the cut. We supply it for components and leads where a sealed sleeve is needed. Yes. It seals the braid so the wall is smooth and resists moisture and fray at the cut.
Technical specifications
| Material | Fiberglass + silicone resin |
| Wall | Sealed, smooth |
| Use | Sealed electrical sleeve |
| Standard | ASTM D5611 (silicone sleeving), IEC 60228 (wire identification), UL 94 V-0. |
| Operating temperature | -50 °C to +200 °C |
| Dielectric strength | ≥ 20 kV/mm (per ASTM test method) |
💾 Datasheets & Test Reports
Download the technical data sheet for this product (PDF).
Applications by industry
- High-voltage transformer and GIS lead insulation
- Motor and generator stator lead barrier sleeving
- Busbar and bushing reinforcing insulation slewing
- Medium-voltage cable joint reinforcing sleeve
- Impregnated glass sleeping for apparatus leads
- Heat-formed, conformable insulating sleeves in machines
Why silicone-resin-impregnated fiberglass for this application
Varnish-impregnated glass forces a solid, moisture-tight dielectric over irregular lead geometry, which plain braid can't do on its own for MV apparatus leads.
Confirm cure and flexibility; heavy impregnation is stiffer but tracks well only if fully cured. Handle class-specific dielectric/thickness.
Standards: IEC 60684-3, ASTM D1000 (adhesion class), IEC 60672.
Feature and remaining-wall review
We cut Silicone Resin Impregnated Fiberglass Sleeve to length and heat-seal or tape the ends; machining is not part of the standard process. Review of feature depth, edge distance and remaining wall happens against critical geometries, and the drawing confirms capability, not a blanket tolerance.
Inspection and traceability
We state the control plan with you. Batch traceability links raw material lot to finished part.
- First-article inspection (FAI) per your plan
- In-process dimensional checks at every station
- Batch certificate of conformance (COA) supplied on request
- Lot traceability to incoming material certificate
- Dielectric strength and insulation resistance testing available on request
Related components
Silicone-Coated Fiberglass Sleeving
Related insulation component from the WELLELE catalog.
Acrylic Fiberglass Sleeving
Related insulation component from the WELLELE catalog.
Silicone-Coated Fire Sleeve
Related insulation component from the WELLELE catalog.
Common questions
Where would you specify Silicone Resin Impregnated Fiberglass Sleeve?
Typical applications are sealed electrical sleeve. Describe the duty and the environment, and we will confirm whether Silicone Resin Impregnated Fiberglass Sleeve is the right grade for it.
Which material is Silicone Resin Impregnated Fiberglass Sleeve manufactured from?
The material is Fiberglass + silicone resin. Alternate grades can be quoted against your drawing.
Is a material certificate of analysis provided for Silicone Resin Impregnated Fiberglass Sleeve?
Material traceability travels with every batch of Silicone Resin Impregnated Fiberglass Sleeve in the certificate of analysis. First-article reports and dielectric testing are carried out to the method you specify.
Can Silicone Resin Impregnated Fiberglass Sleeve be produced to a customer drawing?
Bore, wall and cut length for Silicone Resin Impregnated Fiberglass Sleeve are supplied to your drawing, and the quotation follows the drawing and the quantity you plan to run.
Engineering Guides & Selection Notes
Technical articles that go deeper on selecting and specifying Silicone Resin Impregnated Fiberglass Sleeve.
Get pricing for Silicone Resin Impregnated Fiberglass Sleeve
Send the drawing for Silicone Resin Impregnated Fiberglass Sleeve with your annual volume. We check the material against the duty and tolerance on it, verify ID, OD, wall and features, then come back with manufacturability notes and pricing for Silicone Resin Impregnated Fiberglass Sleeve.