When To Use Rubber Molding

Rubber molding is a versatile and cost-effective manufacturing process used in many industries for decades. It involves heating a rubber material and then pressing it into a mold to create a product with precise dimensions and intricate details. Moreover, it offers several advantages, including enhanced durability, flexibility, and affordability.

However, the technique may not be suitable for every product or application. Therefore, determining when to use rubber molding requires an evaluation of the project’s specific needs. This article will explore the key factors to help you decide whether this method is appropriate for your requirements.

Key Considerations for the Effective Utilization of Rubber Molding

One important factor to consider when using rubber molding is the type of material. Using silicone in the molding process is prevalent due to its multiple benefits. For instance, silicone rubber is known for its tolerance to high temperatures, electrical insulating capabilities, and resistance to harsh environmental conditions.

Here are five additional considerations:

Physical Properties

Rubber molding provides the ability to create products with various physical properties. For example, the elasticity of rubber materials is beneficial for products that require a high degree of flexibility. This includes industrial gaskets, seals, and flexible hoses. Rubber’s durability also makes it an ideal choice for products and applications subjected to repetitive stress.

Hardness is another crucial physical feature that can be modified in molding. The material’s rigidity is advantageous for applications requiring a high degree of stiffness, like structural components and machine parts. As a result, the ability to control and modify the product’s hardness enables manufacturers to create pieces that fulfill unique performance specifications.


The molding process allows for the production of identical, highly consistent components. This decreases the likelihood of manufacturing faults and boosts overall production efficiency. In addition, the low cost of raw materials — silicone and natural rubber — makes it a cost-effective option for high-volume runs.

For small production runs, this technique is not optimal. The cost of forming the mold can be a significant fraction of the total expenses, making this process less cost-effective. Similarly, the lead time can be lengthy, with some molds requiring several weeks to complete. This can be troublesome for runs needing a rapid turnaround time.


Rubber molding is widely known for its ability to create products with accurate dimensions and detailed features. It also allows for the production of intricate shapes and designs, making it suitable for products where appearance and quality are primary concerns. Moreover, the molded rubber parts can be made to precise specifications, ensuring they will fit well and perform as intended.


This technique is a good choice for products that need to be resistant to harsh environmental conditions. Rubber is highly resistant to weathering, ozone, and UV rays. Thus, it ensures that your product will retain its shape, strength, and appearance. This makes rubber molding ideal for outdoor products, including garden hoses, patio furniture, and weather stripping.


While rubber molding is known for being a cost-effective manufacturing technique, it is not necessarily the most economical solution for every application.

Considering initial and ongoing costs is important when deciding when to use the method. Initial costs can be high, as it typically involves the creation of custom molds. These molds must be precisely created and constructed, which can be time-consuming and costly. Meanwhile, the ongoing expenditures include materials, labor, and mold maintenance.

ETI: Your Trusted Partner for Your Molding Needs

For over 45 years, Elastomer Technologies has offered customized molding solutions and part production services to meet the specific needs of our customers! With a focus on quality and attention to detail, we have built a reputation for delivering outstanding results in the molding industry.

Aside from rubber and injection molding, we also offer die-cutting, transfer molding, prototype molding, and other services. You can visit our Services & Capabilities page for more information. You may also contact us if you have any inquiries or request a quote to partner with us!

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