Views: 0 Author: Site Editor Publish Time: 2026-02-06 Origin: Site
The medical industry demands uncompromising standards when it comes to material choice. Whether it's for implants, tubing, gaskets, or surgical tools, the base material must be safe, stable, and durable under extreme conditions. High Temperature Vulcanized (HTV) silicone rubber has emerged as one of the most trusted materials across a wide range of medical applications.
In this article, we'll explore how HTV silicone rubber works, why it's preferred in healthcare settings, and how Hefeng Silicone supports medical manufacturers through certified, high-performance silicone solutions.
High Temperature Vulcanized (HTV) silicone rubber is a solid-type silicone cured under high heat and pressure, ideal for molded medical components.
Offers excellent biocompatibility, sterilization resistance, and long-term flexibility.
Compliant with strict medical-grade standards like USP Class VI, ISO 10993, and FDA 21 CFR 177.2600.
Frequently used for catheters, seals, respiratory masks, valves, and more.
HTV silicone, also called high consistency rubber (HCR), is a solid form of silicone that is vulcanized (cured) using heat and pressure. Unlike liquid silicone rubber (LSR), HTV typically comes in sheets or blocks and requires mechanical processing like compression molding or extrusion.
High molecular weight polysiloxane base
Reinforced with fumed silica for strength
Requires peroxide or platinum catalyst for vulcanization
Excellent thermal, chemical, and mechanical stability
It is particularly suited for medical products due to its dimensional stability, elasticity, and ability to withstand sterilization processes like autoclaving and gamma radiation.
HTV silicone rubber is prized in medical product manufacturing for a range of functional and regulatory advantages:
HTV silicone rubber is non-toxic, non-carcinogenic, and exhibits no adverse biological response, making it safe for applications in and around the human body.
It operates reliably between -60°C to +250°C, making it stable through sterilization processes like:
Autoclaving (Steam)
Ethylene Oxide (EtO)
Gamma Radiation
Elastic yet durable, HTV can flex, seal, and recover over thousands of cycles, suitable for valves, seals, and pump components.
Crucial for medical applications involving mucosal contact or oxygen delivery (nasal cannulas, face masks, etc.).
Ideal for medical electronics and safe-handling applications like ECG lead covers or med-tech interface pads.
HTV silicone rubber used for medical products must comply with international health and safety standards. At Hefeng Silicone, all materials for medical-grade products meet:
USP Class VI – Standard for biocompatibility testing.
ISO 10993 – Evaluation of medical devices for biological hazards.
FDA CFR 21 177.2600 – Food and pharmaceutical grade standards.
RoHS, REACH – No restricted substances or heavy metals.
BPA-Free, Latex-Free – No endocrine disruptors or allergens.
In addition, our production environment supports ISO Class 8 clean room manufacturing to prevent contamination.
With its unique composition and properties, HTV silicone finds roles in both critical and non-invasive medical products:
Flexible yet kink-resistant tubing for fluid delivery, suction devices, and feeding systems.
High-precision O-rings and valve seals in infusion pumps, ventilators, or diagnostic machines.
Used in CPAP masks, oxygen masks, and vent valve diaphragms due to softness and air-tight sealing.
Injections and delivery systems that rely on low-friction, sterilizable plungers.
Reusable sheaths for dental tools, grips for scalpels or forceps, or vibration isolation pads.
Choosing the right silicone rubber depends on the application complexity, production volume, and regulatory demands.
| Feature | HTV (High Temp Vulcanized) | LSR (Liquid Silicone Rubber) |
|---|---|---|
| Form | Solid rubber sheets/blocks | Flowable, injected via mold |
| Molding Process | Compression or extrusion | Liquid injection |
| Tear Strength | High | Moderate |
| Ideal For | Durable parts, simple shapes | Complex geometries, automation |
| Production Volume | Low to mid | Mid to high |
| Cost | Lower tooling costs | Higher initial cost |
HTV silicone is perfect for smaller batches requiring high performance at lower tooling costs. LSR suits high-volume precision parts with complex design.
At Hefeng Silicone, we specialize in medical-grade HTV silicone rubber solutions for global OEMs.
ISO-certified medical production lines
Clean room molding capabilities
Food-grade and medical-grade raw materials
OEM/ODM customization with color, imprint, and shape variation
Fast prototyping for new device development
Whether you need custom HTV extrusions or molded diaphragms, we provide scalable manufacturing and fast global delivery.
High Temperature Vulcanized (HTV) silicone rubber is a highly trusted and versatile material for medical products. Its biocompatibility, durability under sterilization, and excellent mechanical properties make it ideal for critical healthcare applications.
At Hefeng Silicone, we deliver both standard and custom-molded medical-grade HTV parts made to the highest standards in cleanliness, compliance, and precision.
Need custom solutions for your medical device project?
Contact Hefeng Silicone to explore HTV-based options.
HTV silicone is generally used for external medical devices or short-term body contact. For long-term implants, specialized medical-grade platinum-cured silicones are used. Please consult us about your intended application.
Yes. We can color-match silicone compounds that comply with FDA and ISO standards, ensuring both appearance and compliance.
Yes. Most HTV medical components must be sterilized prior to clinical use—HTV is highly compatible with steam, EtO, or gamma sterilization processes.
Hefeng's precision steel molds often support tens of thousands of cycles, making them ideal for low to medium volume production with consistent tolerances.
