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Methyl HTV (MQ-HTV) Silicone Rubber

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

PropertyTypical Value
Operating Temperature–50 °C to +250 °C (short-term to 300 °C)
Tensile Strength5–12 MPa
Elongation at Break100–1,100 %
Tear Strength5–55 N/mm
Hardness (Shore A)40–80
Specific Gravity1.10–1.30 g/cm³
Dielectric Strength11–28 MV/m
Thermal Conductivity0.2–0.3 W/m·K
Compression Set (150 °C / 22 h)5–25 %
Linear Expansion Coefficient2–4 × 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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