Glass Cloth Tape(G-430)
Glass Cloth Tape | High-Strength Electrical Insulation & High-Temperature Protection
Fiberglass Cloth Tape for Motors, Transformers, Coil Wrapping
Glass Cloth Tape is constructed with a woven fiberglass cloth backing and a pressure-sensitive adhesive system available in rubber, acrylic, or silicone grades. It offers high tensile strength, abrasion resistance, and dimensional stability for electrical insulation, coil wrapping, lead protection, and reinforcement in motors, transformers, and wire harness systems.
Key Features & Benefits
- High mechanical strength from woven fiberglass cloth for tight coil wrapping and reinforcement (low elongation, high tear resistance).
- Abrasion & puncture resistance for long-term industrial handling and protection.
- Temperature grades by adhesive system: rubber/acrylic for lower temperature classes, silicone for higher temperature applications.
- Electrical insulation capability (dielectric breakdown data varies by construction; request TDS for test method).
- Converting-friendly: custom widths, lengths, and die-cut formats available for production lines.
Typical Applications
Electrical Insulation
Lead and coil wrapping for motors, transformers, inductors, and capacitors.
Coil cover, outer wrap, banding, end turns, and lead anchor applications in electrical equipment.
Layer and crossover insulation where mechanical strength and insulation stability are required.
Wire harness winding and splicing for motor and generator leads, as well as furnace/oven control wiring.
See Our Motor & Transformer Insulation Guide
Mechanical Reinforcement & Abrasion Protection
Surface protection, reinforcement, and wrap applications where high tensile strength and abrasion resistance are required.
Abrasion protection in wire harness and electrical routing areas exposed to rubbing, sharp edges, or vibration.
Glass cloth tape is suitable for motor lead wrapping, transformer lead protection, coil holding, high-temperature wire protection, and abrasion-resistant insulation support where woven glass cloth backing and heat-resistant adhesive are required. For broader material selection across glass cloth tape, polyimide tape, PET electrical tape, and other insulation materials, see our Electrical Insulation guide before confirming the final specification.
Common Failures to Avoid (and How to Prevent Them)
Adhesive softening → edge lift or creep at temperature
- Cause: adhesive grade not matched to peak temperature/dwell time
- Prevention: choose adhesive system by temperature class (rubber/acrylic vs silicone) and validate under real thermal cycle.
Insufficient dielectric margin
- Cause: tape thickness and dielectric breakdown not verified for the insulation system
- Prevention: request dielectric breakdown data (test method e.g., ASTM D149) and validate on the full insulation stack.
Abrasion damage in harness/coil routing
- Cause: rubbing against edges or vibration points
- Prevention: select appropriate thickness and ensure correct wrap tension; fiberglass cloth construction is specifically valued for abrasion resistance.
DATASHEET
Item No. | G-430R | G-430A | G-430S |
| Adhesive type | Rubber | Acrylic | Silicone |
| Total thickness | 0.18 mm | 0.18 mm | 0.18 mm |
| Adhesion to steel | 8.5 N/25mm | 9.0 N/25mm | 10.0N/25mm |
| Tensile strength | 400N/25mm | 450N/25mm | 450N/25mm |
| Elongation at break | 5% | 5% | 5% |
| Temperature resistance | 130°C | 155°C | 180°C |
| Dielectric breakdown | 3 KV | 2 KV | 3 KV |
| Standard roll length | 30 M | 30 M | 30 M |
Recommended Standards for Reference
- Peel Adhesion: ASTM D3330
- Tensile Strength & Elongation: ASTM D3759
- Dielectric Breakdown Voltage: ASTM D149
- Total Thickness: ASTM D3652
- IEC 60454-3-8: Glass fabric tapes with pressure-sensitive adhesive
How to Choose (Adhesive System & Temperature Class)
The temperature classes below refer to electrical insulation applications by adhesive system and grade. For glass cloth electrical insulation tape, typical thermal classes include 130°C, 155°C, and 180°C, depending on adhesive system and product grade. Final suitability should always be validated under the actual insulation system and operating conditions.
Rubber adhesive (Class B ~130°C): cost-effective general insulation and bundling where temperature is moderate.
Acrylic adhesive (Class F ~155°C): improved heat aging for many electrical insulation applications.
Silicone adhesive (Class H ~180°C): preferred for higher-temperature electrical insulation environments. For applications requiring higher peak process temperatures, confirm suitability by product family and actual process profile.
Quick selection tip: choose based on peak temperature + dwell time ++vibration/abrasion conditions, not temperature alone.
Converting & Customization
Custom widths and lengths (small rolls to log/jumbo formats)
Rolls, sheets, and die-cut formats
OEM packaging and labeling support for distributors and long-term programs
Quality, Documentation & Traceability
We support engineering approval with:
TDS and application Guidance
Downloads
Download TDS (PDF)
View All Datasheets
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FAQ
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Request a quote or samples with your required thickness, width, roll format, and operating temperature profile. Our team will recommend the optimal grade and converting option for your application.
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