As the medical sealing industry accelerates its upgrade, DoitRubber addresses pain points through customization and core technological breakthroughs.

 As global healthcare industry requirements regarding the stability, consistency, and biocompatibility of seals continue to tighten, diverse application scenarios are driving a significant surge in demand for customized medical seals; indeed, customized medical sealing components have gradually emerged as a core trend in the industry’s ongoing evolution. Against this backdrop, Huizhou Doit Precision Products Co., Ltd. (International Brand: DoitRubber) — a specialist in rubber sealing products — is leveraging its extensive technical expertise in the fields of medical equipment and consumables. The company is specifically addressing common industry challenges associated with silicone stoppers for reagent kits: namely, reagent incompatibility and failure to meet cytotoxicity standards caused by the migration and leaching of volatile organic compounds from raw materials, as well as needle-clogging errors during puncture caused by the self-adhesion of the stopper’s incision site. By systematically tackling these issues through targeted formula modifications and process optimizations, DoitRubber has successfully developed and implemented mature, localized solutions.

Medical silicone seals serve as critical foundational components for medical devices and in vitro diagnostic (IVD) consumables; their quality directly determines the safety of reagent storage and the operational stability of equipment. DoitRubber has designated medical silicone rubber sealing products as one of its core business segments. Its comprehensive product line encompasses a wide array of precision components — including silicone caps for IVD reagent kits, seals for cryovials, specialized silicone sheets for reagents, seals for ventilators, gaskets for nebulizers, and one-way valves for blood pressure monitors — and is widely utilized in key applications such as in vitro testing, respiratory care, and medical consumables.

In terms of quality control, DoitRubber has established a comprehensive and compliant framework, featuring a dedicated Class 100,000 medical-grade cleanroom facility where the production environment is rigorously monitored throughout the entire process. All medical sealing products are guaranteed to exhibit zero leaching of harmful substances and have successfully obtained numerous authoritative certifications — including the ISO 13485 Quality Management System for Medical Devices and U.S. FDA approval — with all performance metrics meeting stringent biocompatibility testing standards. Leveraging years of hands-on experience in the mid-to-high-end biomedical market, DoitRubber offers targeted product development tailored to specific client equipment parameters and operating conditions. We flexibly accommodate OEM and ODM custom orders, thereby precisely addressing the diverse and differentiated procurement needs of the medical sector.

DoitRubber has achieved significant technological breakthroughs regarding silicone caps for IVD (In Vitro Diagnostic) reagent kits — precision components that undergo frequent piercing and come into direct contact with reagents. Addressing two major, industry-wide challenges — specifically, the migration of chemical elements from the silicone, material-reagent incompatibility, and failures in cytotoxicity testing; as well as the issue of silicone incision self-healing, which obstructs automated assembly probes and triggers system alarms — DoitRubber undertook a systematic, root-cause analysis.

The research revealed that the root causes of these persistent issues lie in several factors: the complex composition and low purity of traditional material formulations; the lack of rigor in manufacturing processes and parameter settings; and the incomplete removal of VOC (Volatile Organic Compound) components. Furthermore, the silicone materials typically selected for these applications lack the inherent capability to prevent incision self-healing; this deficiency, compounded by unscientific manufacturing and storage conditions, accelerates the healing and adhesion of the incision sites.

To address this, DoitRubber has opted to utilize high-purity fumed silica or specialized medical-grade silicone — materials proven to pass biocompatibility testing — thereby enhancing material purity at the very source. Concurrently, the company has successfully developed a specialized silicone formulation featuring self-healing capabilities against incisions, while also optimizing conditions for product manufacturing, storage, and transportation to effectively prevent incision adhesion. This series of innovations has successfully resolved persistent issues — such as failures in cytotoxicity testing caused by residual VOCs, and needle-clogging errors during punctures resulting from the adhesion of self-healing silicone septa. Consequently, the safety, stability, and compatibility of DoitRubber’s medical seals have been significantly enhanced, fully meeting the mass production demands associated with the automated assembly of high-end medical equipment.

Currently, China’s domestic medical sealing industry is rapidly transitioning toward greater precision, customization, and regulatory compliance. With material R&D at its core and customized services as its strategic lever, DoitRubber continues to bridge the technological gaps within the domestic sector for precision medical seals. Moving forward, DoitRubber will further intensify its investment in the R&D of novel medical materials and expand its portfolio of medical sealing solutions across diverse application scenarios, thereby contributing to the high-quality development of the entire upstream and downstream supply chain for domestic medical devices.