What Is HTV Silicone and LSR? Key Differences and Applications

Silicone rubber is widely used in industrial, consumer,automotive, and medical applications. Among the most common production technologies are HTV silicone (High Temperature Vulcanizing) and LSR (Liquid Silicone Rubber). While both are silicone-based elastomers, they differ in processing methods, production efficiency, and application focus.

Understanding the difference between HTV silicone and LSR helps engineers, designers, and purchasing teams choose the most suitable solution for their projects.

What Is HTV Silicone?

HTV silicone is a solid, high-consistency silicone rubber that is processed through compression molding, transfer molding, or extrusion. It is typically cured using platinum (Pt cure) or peroxide cure systems.

HTV silicone is known for its:

• Excellent mechanical strength

• High temperature resistance

• Broad Shore A hardness range

• Flexibility in custom formulations

When produced with high-purity silicone compounds and platinum curing systems, HTV silicone delivers performance levels that are very close to LSR in many applications, particularly where tight tolerances or fully automated injection molding are not mandatory.

What Is LSR (Liquid Silicone Rubber)?

LSR (Liquid Silicone Rubber) is a two-component, low-viscosity silicone system processed via injection molding. It enables fully automated, high-volume production with excellent repeatability.

LSR silicone is typically preferred for:

• High-volume production

• Complex geometries

• Medical and healthcare products

• Applications requiring minimal flash and high precision

Due to its automated process, LSR offers advantages in cycle time, consistency, and scalability—especially in large production runs.

Our Approach: HTV Expertise and LSR Readiness

Currently, our production focuses on HTV silicone solutions, formulated in-house using high-purity silicone raw materials and platinum cure systems. This allows us to achieve performance, cleanliness, and longevity levels comparable to LSR for a wide range of applications.

At the same time, we are actively preparing for LSR production. In the near future, we plan to invest in LSR injection molding machines, enabling us to manufacture LSR products with the same engineering-driven approach and material expertise we apply to HTV silicone today.

This transition will allow us to offer both HTV and LSR silicone solutions, ensuring that our customers always receive the most suitable technology for their application—without compromise.