HTV Solid Silicone Overview

Also called: Heat-Cured Silicone, High-Temperature Vulcanizing Silicone, VMQ. Solid silicone is compression-molded from gum-stock preforms and cured under heat and pressure. It is the most cost-effective silicone processing method for low-to-medium volumes and larger parts.

Key Properties

Property	Typical Value
Shore A Hardness	10 – 80 Shore A
Operating Temp. Range	-60°C to +230°C (300°C intermittent)
Tensile Strength	7 – 12 MPa
Elongation at Break	200 – 600%
Color Options	Any Pantone / RAL
Shrink Rate (Compression Mold)	1.5 – 3%

Common Grades

• General Purpose: Standard VMQ, good balance of properties, cost-effective.
• High-Strength: Tensile >10 MPa, for dynamic seals and high-stress parts.
• High-Temperature: Stable to 300°C intermittent, for industrial ovens and automotive.
• Low Compression Set: For sealing applications requiring long-term elastic recovery.
• FDA / Food-Grade: Complies with 21 CFR 177.2600, odorless, non-toxic.
• Flame Retardant: UL 94 V-0 rated, low smoke toxicity (railway/aircraft).
• Conductive / ESD: Carbon- or silver-filled, surface resistivity 10^2 – 10^6 Ω/sq.

Typical Applications

• Industrial seals & gaskets
• Food-processing equipment seals (FDA)
• Automotive sensors & lighting seals
• HVAC gaskets
• Consumer bakeware (food-grade)