Reasons Why You Should Choose Liquid Silicone Rubber

Reasons Why You Should Choose Liquid Silicone Rubber Molding

Here we will discuss the reasons why you should choose liquid silicone rubber for your projects. First, let’s talk about LSR and HCR. Liquid silicone rubber (LSR) and high-consistency rubber (HCR) find application in various industries as two distinct materials with unique characteristics. The primary differentiator lies in the “flow” or “liquid” nature of LSR, as opposed to HCR’s peroxide cure, where LSR utilizes addition/cure/platinum cure. The unique characteristics of LSR enable it to be injection molded or cast into rubber sheets. It consists of LSR material, typically comprising Part A and Part B liquid components, which undergo a curing process when mixed and accelerated with heat.

In contrast to many thermoplastic elastomers like TPEs and TPRs, LSR stands out with its exceptional performance attributes and fast cure cycles. This makes it a preferred choice for manufacturing small, intricate molded components. Its flexibility and elasticity remain intact in extreme temperatures, ranging from -60°C to 250°C, making LSR highly suitable for products that demand precision.


Here are seven key reasons why you should choose liquid silicone rubber a compelling option for injection molding


LSR serves as the material of choice for diverse applications. It includes automotive equipment, medical devices, electronic components, bakeware, household goods, and more. Its versatility allows for single- and two-shot injection molding or overmolding onto other components, enabling the creation of simple parts like gaskets and O-rings, as well as complex geometries for instruments and system components.


With excellent dynamic properties, LSR can be molded into practically any shape while maintaining low creep and compression set. Its ability to absorb vibrations without compromising performance makes it ideal for long-lasting automotive components and other products requiring durability.

Extreme Temperature Resistance

LSR exhibits exceptional thermal stability, making it flame-retardant and resistant to elongation at high temperatures. It retains flexibility even in frigid environments as low as -40°C, making it suitable for consumer products like muffin tins and ice cube trays, as well as heavy-duty industrial applications.

Outdoor Durability

Thanks to its thermal stability, LSR excels in long-term outdoor use, retaining mechanical strength and other characteristics despite exposure to harsh weather conditions. Additionally, LSR’s resistance to bacteria, mold, mildew, and UV rays further enhances its appeal for outdoor applications.

Moisture Resistance

LSR can withstand immersion in warm or boiling water without adverse effects. It is also resistant to oils and chemical solvents and does not decompose or degrade over time. This makes LSR an excellent choice for plumbing hardware, medical devices, and products that require routine sterilization.


Unlike other materials, LSR does not contain plasticizers or allergens that could irritate sensitive skin. So, it is ideal for baby products and toys. Food-grade LSR is also available, ensuring compliance with HACCP best practices and FDA regulation 21 CFR 177.2600.

Electrical Conductivity

LSR possesses excellent insulating properties and is resistant to corona discharge. Additionally, LSR can be formulated with conductive materials, making it suitable for use in electrical components like keyboard contact points.


Considering the numerous advantages of liquid silicone rubber for injection molding, it’s evident that LSR can significantly enhance the performance and durability of your products. If you need more information or assistance in determining whether LSR is the right choice for your project, contact YHLSR Silicone Parts, where our knowledgeable representatives are ready to assist you.