What Types of Silicone Rubber Are Available?-Iota

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News > Dynamic industry > What Types of Silicone Rubber Are Available?

What Types of Silicone Rubber Are Available?

Silicone rubber is a versatile elastomer that can be classified by curing method, physical form, chemical structure, and special functions.

1. By Curing Method

RTV Silicone Rubber (Room Temperature Vulcanizing)

Cures at room temperature without heating.
RTV-1: One-component, commonly used for sealants and glass bonding.
RTV-2: Two-component, used for mold making, casting, and electronic potting.

HTV Silicone Rubber (High Temperature Vulcanizing)

Requires curing at 150–200°C.
Offers high strength and excellent durability.
Used in automotive seals, insulators, wires, and industrial components.

2. By Physical Form

HCR (High Consistency Rubber)

Solid silicone rubber.
High strength and durability.
Suitable for extrusion and compression molding.

LSR (Liquid Silicone Rubber)

Two-component liquid system.
High purity, transparency, and fast curing.
Widely used in medical devices, baby products, and wearables.

3. By Chemical Structure

MQ (Methyl Silicone Rubber)

Basic silicone rubber with good heat and electrical resistance.

MVQ (Methyl Vinyl Silicone Rubber)

Most widely used type.
Excellent balance of performance and cost.
Good UV, ozone, and aging resistance.

PVMQ (Phenyl Silicone Rubber)

Superior low-temperature performance.
Some grades remain flexible below -100°C.
Common in aerospace and extreme environments.

4. By Special Function

Medical Grade Silicone Rubber

Biocompatible and sterilization resistant.
Used in implants, tubing, and medical devices.

Food Grade Silicone Rubber

Non-toxic and odorless.
Meets FDA and food-contact standards.

Fluorosilicone Rubber (FVMQ)

Excellent resistance to fuels, oils, and solvents.
Used in automotive and aerospace systems.

Conductive Silicone Rubber

Provides electrical conductivity and EMI shielding.

Thermally Conductive Silicone Rubber (TCSR)

Enhanced heat dissipation for electronics and batteries.

Sponge/Foam Silicone Rubber

Lightweight with cushioning and sealing properties.
Used for insulation, sealing, and vibration damping.

Summary

The most common silicone rubber types are RTV, HTV, HCR, LSR, MVQ, PVMQ, medical-grade, food-grade, fluorosilicone, conductive, and thermally conductive silicone rubber. Each type is designed for specific applications ranging from consumer products and electronics to automotive, medical, and aerospace industries.

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