Fiberglass Textiles
Fiberglass Rope
Code prefix GR
Fiberglass rope is twisted from E-glass yarn and used as a compression seal or as a flexible core inside a higher-temperature cover. It is the economical choice where the duty stays below 500 C and where electrical insulation matters more than refractory performance.
- Continuous
- 500°C
- 932 °F
- Short peak
- 550°C
- 1022 °F
- Construction
- Unreinforced
- GR
Spec sheets are issued against the confirmed grade, with the test method named on the report.
01 — Product description
An economical compression seal
Fiberglass rope is twisted from E-glass yarn and used where the duty stays below 500 C. It seals by compression in a channel, or acts as a flexible non-conductive core inside a cover. It costs less than ceramic rope and is easier to handle, which is why it appears on oven doors, dryer seals and gland packing where the temperature does not justify a refractory fiber.
The limitation is thermal. Glass yarn softens and loses strength as it approaches its service ceiling, and a rope that has been compressed hot does not recover its section when the door opens. Allow for take-up in the latch rather than expecting the rope to spring back.
| Code | Section |
|---|---|
| GTR3 | 3 mm |
| GTR6 | 6 mm |
| GTR10 | 10 mm |
| GTR15 | 15 mm |
| GTR25 | 25 mm |
| GTR35 | 35 mm |
| GTR50 | 50 mm |
Installation
- Measure the groove at its tightest point and allow for compression.
- Butt the ends rather than overlapping, so the door lands evenly.
- Use the silicone finished grade where splash or dust ingress matters.
- Replace seals that have flattened rather than adding a second rope on top.
02 — Characteristics
Compression seal
Round sections seat into a channel and compress against a door or lid.
Dielectric core
Suitable as a non-conductive core in covers and gaskets.
Economical
Lower material cost than ceramic rope where the temperature allows.
03 — Typical properties
Values typical, confirm against duty
| Test item | Value | Note |
|---|---|---|
| Yarn | Twisted | |
| Continuous | Static duty | |
| Short excursion | Not a duty rating | |
| Section | Round, twisted | |
| Finish | Silicone for splash |
04 — Standard sizes
| Product code | Dimensions |
|---|---|
| GTR3 | 3 mm round |
| GTR6 | 6 mm round |
| GTR10 | 10 mm round |
| GTR15 | 15 mm round |
| GTR25 | 25 mm round |
| GTR50 | 50 mm round |
05 — Where it is used
- Oven and dryer door seals
- Cable gland packing
- Non-conductive gasket core
- Dust and heat sealing strip
- Cover edging
Service limits
- Not suitable above 500 C continuous; use ceramic rope for higher duty.
- The rope compresses permanently after the first thermal cycle; allow a take-up.
- Wear gloves when handling cut ends.
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Fiberglass Rope
GR