Methyl HTV (MQ‑HTV) Silicone Rubber
Silico® MQ‑HTV is a heat-curable methyl silicone rubber with high thermal resistance, mechanical strength, and stability. It cures via peroxide or platinum and is used in automotive, electrical, and industrial applications.
Product Overview
Silico® MQ‑HTV is a high-consistency, heat-curable methyl silicone rubber designed for applications requiring superior thermal resistance, mechanical strength, and long-term stability. Cured using either peroxide or platinum catalysts, this material is widely used in automotive, electrical insulation, and industrial molding applications.
Key Technical Specifications
| Property | Typical Value |
|---|---|
| Operating Temperature | –50 °C to +250 °C (short-term to 300 °C) |
| Tensile Strength | 5–12 MPa |
| Elongation at Break | 100–1,100 % |
| Tear Strength | 5–55 N/mm |
| Hardness (Shore A) | 40–80 |
| Specific Gravity | 1.10–1.30 g/cm³ |
| Dielectric Strength | 11–28 MV/m |
| Thermal Conductivity | 0.2–0.3 W/m·K |
| Compression Set (150 °C / 22 h) | 5–25 % |
| Linear Expansion Coefficient | 2–4 × 10⁻⁴ K⁻¹ |
Tested according to ASTM and ISO standards.
Processing and Curing
Curing Systems: Peroxide-cured for general industrial use; platinum-cured for low shrinkage, high-purity applications
Processing Methods: Compatible with extrusion, compression molding, and injection molding
Curing Conditions: Typical curing at 150–180 °C under pressure, depending on catalyst and part geometry
Product Advantages
High Thermal Stability: Performs continuously from –50 °C to 250 °C, with peak stability up to 300 °C
Excellent Mechanical Performance: High tear strength, elongation, and recovery
Outstanding Electrical Insulation: Reliable dielectric properties for high-voltage applications
Weather, UV, and Ozone Resistance: Long-term performance in harsh outdoor environments
Flexible Formulation: Available in multiple hardness levels, with customizable additives for flame retardance, oil resistance, or pigmentation
Global Compliance: RoHS, REACH, and UL-listed grades available
Typical Applications
- High-temperature gaskets, O-rings, and seals
Cable insulation and electrical jacketing
Automotive under-hood components
Industrial molded parts exposed to heat or chemicals
Rollers, sleeves, and high-load silicone assemblies
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