GFRP / GFK (Glass Fiber Reinforced Epoxy) vs Silicone Rubber (VMQ/HTV): 0% composition overlap. Significantly different materials serving different application areas.
GFRP / GFK (Glass Fiber Reinforced Epoxy) vs Silicone Rubber (VMQ/HTV)
Side-by-side chemical composition and mechanical property comparison.
Overview
GFRP / GFK (Glass Fiber Reinforced Epoxy)
Glass fiber reinforced epoxy composite — the cost-effective structural composite for industrial, marine and construction applications. E-glass fiber in epoxy matrix. Unidirectional: UTS ~1000 MPa, E ~40 GPa. Quasi-isotropic layup: UTS ~300 MPa, E ~18 GPa. Density 1.8–2.1 g/cm³. Electrically insulating (unlike CFRP). Used for boat hulls, wind turbine blades, chemical tanks/pipes, architectural panels, ladders, gratings, automotive body panels and electrical insulation structures.
Silicone Rubber (VMQ/HTV)
Silicone rubber (VMQ = Vinyl Methyl Polysiloxane) — THE extreme-temperature elastomer. Usable from -60°C to +230°C continuous (short-term +300°C). Excellent UV/ozone/weathering resistance. Biocompatible (FDA, USP Class VI). Low compression set. Electrically insulating. Lower tensile/tear strength than organic rubbers. Used for seals/gaskets, medical tubing/implants, food-grade components, baby products, automotive ignition boots, and LED/lighting encapsulation.
| GFRP / GFK (Glass Fiber Reinforced Epoxy) | Silicone Rubber (VMQ/HTV) | |
|---|---|---|
| Material Number | — | — |
| Category | Polymers | Polymers |
| Standard | ASTM D3039 | ISO 37 |
Mechanical properties
| Property | GFRP / GFK (Glass Fiber Reinforced Epoxy) | Silicone Rubber (VMQ/HTV) | Unit |
|---|---|---|---|
| Tensile Strength | 900–1100 | — | MPa |
| Tensile Modulus | 38–45 | — | GPa |
| Density | 1.8–2.1 | — | g/cm³ |
Compatibility Assessment
GFRP / GFK (Glass Fiber Reinforced Epoxy) and Silicone Rubber (VMQ/HTV) have significantly different compositions (0% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is GFRP / GFK (Glass Fiber Reinforced Epoxy) the same as Silicone Rubber (VMQ/HTV)?
GFRP / GFK (Glass Fiber Reinforced Epoxy) and Silicone Rubber (VMQ/HTV) have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace GFRP / GFK (Glass Fiber Reinforced Epoxy) with Silicone Rubber (VMQ/HTV)?
Generally not recommended. The compositions differ significantly (0% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between GFRP / GFK (Glass Fiber Reinforced Epoxy) and Silicone Rubber (VMQ/HTV)?
The main differences are in the following elements: overall alloying content. GFRP / GFK (Glass Fiber Reinforced Epoxy) is a Polymers grade, while Silicone Rubber (VMQ/HTV) is a Polymers grade.
View full data for each material:
Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.