ENGINEERING GUIDE

Fiberglass Sleeving Temperature Rating Guide

A temperature number alone is not enough to qualify electrical fiberglass sleeving. Coating chemistry, continuous and peak exposure, dielectric requirements, bending, fluids and approval standards determine reliable service.

High temperature silicone resin fiberglass sleeving
Fiberglass braid and coating form one insulation system

MATERIAL COMPARISON

Match the coating system to the application

Silicone Resin

Balances heat resistance, dielectric performance and dimensional stability for transformer leads, power supplies and industrial insulation.

Silicone Rubber

Provides flexibility and high-temperature capability for motor leads, harness bends and vibration-prone assemblies.

Acrylic Coating

Supports applications balancing cost, mechanical protection and moderate thermal requirements.

RATING CONTEXT

A 200°C rating does not mean unlimited service at 200°C

Published temperature classes are tied to defined tests. Real assemblies add conductor heating, ambient temperature, thermal cycling, fluids, bending and local hot spots.

Document continuous temperature, peak temperature and duration separately. If sleeving is part of the primary insulation system, confirm dielectric withstand and system requirements independently.

RFQ CHECKLIST

Eight conditions needed for selection

1Continuous temperature
2Peak temperature and duration
3Voltage requirement
4Inner diameter and tolerance
5Bending and installation
6Fluids and environment
7Flammability and approvals
8Service life and test standard

VIDEO GUIDE

High-temperature insulation sleeving in application

See a quick application view, then use the comparison and checklist on this page to define the correct coating system and validation conditions.

View all technical videos

FAQ

Qualification questions

Can an imported grade be replaced by temperature class alone?

No. Compare coating, dimensions, wall build, dielectric strength, flexibility, flammability and aging.

What should sample validation include?

Include installation, bending, thermal aging, dielectric and end-use environmental tests.

ENGINEERING SUPPORT

Send your temperature and insulation conditions

Include application, continuous and peak temperature, size, voltage, approvals and estimated demand.