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Debunking Misconceptions about Liquid Silicone Rubber (LSR)

By 3 min readPublished On: May 30th, 2023Last Updated: May 30th, 2023Categories: Silicone industry knowledge

Liquid silicone rubber (LSR) is a versatile material that finds applications in various industries. However, there are several misconceptions surrounding LSR that hinder its widespread adoption. In this article, we will address these misconceptions and provide valuable insights to debunk them, promoting a more accurate understanding of LSR and its capabilities.

Section 1: Myth 1 – “LSR is not a durable material”

Contrary to popular belief, LSR is an exceptionally durable material that can withstand harsh conditions and offer long-lasting performance. Its durability stems from its unique molecular structure, which provides excellent resistance to temperature extremes, UV radiation, chemicals, and aging. For example, LSR gaskets have been used in automotive applications, sealing engine components under extreme conditions for years without degradation.

Section 2: Myth 2 – “LSR is difficult to process”

The perception that LSR is challenging to process is outdated. Advances in LSR processing technologies, such as injection molding, have simplified the manufacturing process. LSR’s low viscosity allows for efficient and precise injection into complex molds, resulting in intricate and accurate part production. Furthermore, automated processes enable high-volume production, making LSR a cost-effective choice for various industries, including consumer electronics and automotive.

Section 3: Myth 3 – “LSR is not suitable for medical applications”

LSR is an ideal material for medical applications due to its exceptional biocompatibility and hypoallergenic properties. It meets strict medical industry standards, including USP Class VI and ISO 10993 certifications. LSR’s stability, resistance to bacterial growth, and ease of sterilization make it suitable for medical devices like implants, respiratory masks, and baby products. Its ability to mimic soft tissue properties is particularly advantageous in prosthetics and wearable medical devices.

Section 4: LSR Applications and Industry Success Stories

To reinforce the capabilities of LSR, let’s explore some notable applications across industries.

4.1 Automotive Industry

LSR’s durability, high-temperature resistance, and ability to withstand automotive fluids make it an excellent choice for gaskets, seals, connectors, and lighting components. Its electrical insulation properties also contribute to its usage in electric vehicle (EV) applications.

4.2 Consumer Electronics

LSR’s flexibility, water resistance, and thermal stability make it suitable for protective covers, buttons, and connectors in electronic devices. Its transparent and UV-resistant properties make it an ideal material for smartwatch straps, phone cases, and wearable technology.

4.3 Healthcare and Medical Devices

In addition to the aforementioned medical applications, LSR is widely used in dental products, including orthodontic appliances, clear aligners, and denture liners. Its biocompatibility, non-reactive nature, and ease of sterilization ensure patient safety and comfort.


To address common questions and provide concise answers, here are some frequently asked questions about LSR:

Q1: Is LSR environmentally friendly?

A1: Yes, LSR is eco-friendly as it does not contain harmful substances like phthalates or heavy metals and is recyclable.

Q2: Can LSR be colored?

A2: Yes, LSR can be pigmented with a wide range of colors and achieve consistent coloration throughout the material.

Q3: What is the lifespan of LSR products?

A3: LSR products have a long lifespan, often exceeding 10 years due to their durability and resistance to degradation.

Q4: Can LSR be combined with other materials?

A4: Yes, LSR can be overmolded onto various substrates like plastics or metals, enabling the creation of hybrid components with enhanced functionality.


By debunking the misconceptions surrounding liquid silicone rubber (LSR), we have shed light on its true potential and versatility. LSR’s durability, ease of processing, and suitability for medical applications make it an invaluable material across industries. As awareness grows, more businesses can embrace LSR’s benefits and unlock innovative solutions. Let us appreciate LSR for what it truly is—a reliable and high-performance material that paves the way for endless possibilities.