Vinyl Methyl HTV (VMQ) Silicone Rubber
Silico® VMQ HTV is a high-consistency vinyl silicone rubber for molding, extrusion, and insulation. It offers excellent heat resistance, strength, and weatherability. Available in peroxide and platinum cure types for improved performance.
Product Overview
Silico® VMQ HTV silicone rubber is a high-consistency elastomer based on vinyl-modified methyl siloxane polymers. It is designed for high-performance molding, extrusion, and insulation applications where thermal stability, mechanical strength, and environmental resistance are critical. Available in peroxide- and platinum-cured grades, VMQ offers enhanced curing efficiency and mechanical versatility compared to standard methyl silicone rubber.
Key Technical Specifications
| Property | Typical Value / Range |
|---|---|
| Service Temperature | –60 °C to +250 °C (short-term up to 300 °C) |
| Hardness (Shore A) | 20 – 90 |
| Tensile Strength | 4 – 10 MPa |
| Elongation at Break | 200 – 900 % |
| Tear Strength | 5 – 55 N/mm |
| Compression Set | ≤ 25% (150 °C / 22 h) |
| Dielectric Strength | ≥ 20 kV/mm |
| Specific Gravity | 1.10 – 1.30 g/cm³ |
Tested according to ASTM and ISO standards.
Curing & Processing
Curing Systems:
Peroxide-Cured VMQ: Cost-effective, widely used in industrial applications
Platinum-Cured VMQ: Clean cure, low shrinkage, suitable for medical and food-grade applications
Processing Methods:
Compression molding, injection molding, extrusion
Key Performance Advantages
Wide operating temperature range with excellent flexibility at low temperatures
Superior tear and tensile strength compared to conventional methyl silicone
High electrical insulation and dielectric performance
Excellent resistance to UV, ozone, and weathering
Biocompatible and food-safe grades available (platinum cure)
Easy processing with high dimensional stability
Applications
Automotive gaskets, O-rings, ignition seals
Electrical insulators, cable jacketing
Medical tubing, valves, molded components
Food-contact extrusions and bakeware
High-precision molded parts in electronics and industrial assemblies
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