Liquid Silicone Rubber (LSR) Over Moulding Solutions

As a supplier of injection moulded enclosures, Rubbertech is aware of the customer’s need for sealing their assemblies.

Where a high sealing IP rating is required, Rubbertech provides a silicone overmolding solution that ensures superior sealing and eliminates concerns about leakage between the plastic enclosure and its mating components. This innovative molding process combines mechanical and chemical bonding to deliver the best solution for applications requiring exceptional sealing performance.

The result is fully bonded components made from various material combinations, making it ideal for environments with high temperature and high-pressure demands. By leveraging our advanced injection molding process, we achieve exceptional quality control, ensuring consistent and reliable results in every project.

Our liquid silicone overmolding process involves pre-molding the plastic component, which is then precisely loaded into the LSR (Liquid Silicone Rubber) injection tool. Unlike traditional HCR silicone used in compression molding, molding silicone in its liquid form does not require high compression forces. This ensures that the plastic enclosure remains unaffected during the injection molding process.

Additionally, LSR overmolding allows for the incorporation of various thermoplastics, offering unmatched versatility and durability. Beyond sealing, this process enhances the aesthetic appeal and durability of plastic mouldings by adding a protective silicone rubber layer. The absence of sinkage issues, which are common in 2-shot injection moulding, further highlights the cost-effective and high-quality nature of liquid silicone overmolding.

Materials that can be over-moulded include a wide range of thermoplastics and rubbers, available in all colours and various LSR hardness grades. If your project requires a specific material not listed, our team will work to confirm its availability. Our process not only offers significant time savings but also ensures that each product meets stringent quality control standards, making it the ultimate choice for applications requiring precision and performance.

LSR & Nylon –

LSR & Glass filled Nylon –

LSR & PC –

LSR & PPSU –

LSR & PP –

LSR & PBT –

LSR & PET –

LSR & Metal components –

LSR & Glass –

LSR & PCBA

For more information about our Liquid Silicone over mouldings please contact our engineering sales team.