What Is HTV Silicone Rubber?
HTV Silicone Rubber (High Temperature Vulcanized Silicone Rubber), also commonly called HCR (High Consistency Rubber), is a solid, heat-cured silicone elastomer used for compression molding, extrusion and other industrial silicone processing methods.
Yakows HTV silicone rubber is developed for applications that require reliable heat resistance, elasticity, electrical insulation, weather resistance and long-term material stability. Depending on the grade, the compound can be customized by hardness, color, curing system and application-specific performance.
Current Yakows HTV products cover general-purpose molding, high tear strength, anti-yellowing, flame-retardant, food-grade, medical-grade and electrical insulation formulations for composite insulators and other power-industry components.
- Solid / high-consistency silicone rubber
- Peroxide or platinum curing by grade
- Compression molding and extrusion
- Custom hardness and color options
- Industrial and electrical insulation grades
- TDS, SDS and compliance support
HTV Silicone Rubber Grades for Different Applications
Instead of using one formulation for every application, Yakows provides multiple HTV/HCR silicone rubber grades according to mechanical performance, appearance, flame resistance, electrical insulation and regulatory requirements.
Each product below links to the corresponding Yakows grade page, with the existing product/application imagery retained to help buyers identify the material more quickly.
General Purpose HTV Silicone Rubber
30A–90A options for common compression-molded silicone products.
Suitable for O-rings, gaskets, pads, buttons, keypads and general molded silicone components.
View Product
High Tear Strength HTV Silicone Rubber
For products requiring improved tensile and tear performance.
Used for high-strength molded products, flexible parts, sheathing, bands and demanding silicone components.
View Product
High Yellowing Resistant HTV Silicone Rubber
30A–90A options for white, transparent, translucent and light-colored products.
Suitable for O-rings, gaskets, buttons, keypads, kitchenware, baby products and visible molded parts.
View Product
Flame Retardant Silicone Rubber
General flame-retardant, high-strength and UL 94 V-0 grade options.
For electrical insulation, wire and cable, automotive protection and industrial molded components.
View Product
Food Grade HCR Silicone Rubber
Platinum-cured, low-odor options for selected food-contact applications.
For kitchenware, baking molds, food-contact seals, appliance parts and selected baby products.
View Product
Medical Grade HTV Silicone Rubber
Selected high-purity HTV formulations for healthcare-related components.
Typical applications include medical tubing, respiratory masks and healthcare sealing components.
View Product
HTV Silicone Rubber for Composite Insulators
Electrical insulation formulation for demanding outdoor power applications.
Developed for hydrophobicity, tracking and erosion resistance, UV aging and mechanical durability.
View Product
HTV Silicone Rubber for Hollow Core Insulators
Material solution for high-voltage and ultra-high-voltage outdoor equipment.
Suitable for GIS, transformer and reactor bushings, switchgear and transmission-related insulation systems.
View ProductTypical HTV Silicone Rubber Supply & Performance Options
The table below summarizes information already represented across Yakows HTV product pages. Exact mechanical and electrical values should always follow the TDS of the selected grade.
| Item | Yakows HTV / HCR Offering | Selection Note |
|---|---|---|
| Material Form | Solid / high-consistency silicone rubber compound | Designed for heat-curing processes |
| Hardness | Selected product families support 30A to 90A Shore A | Choose according to sealing, flexibility and part structure |
| Appearance / Color | Translucent, white, black and custom colors depending on grade | Anti-yellowing options available for light-colored parts |
| Curing System | Peroxide or platinum-catalyzed systems according to formulation | Confirm cure chemistry before sampling |
| Processing | Compression molding, extrusion and transfer molding; other processes by grade | Select formulation according to equipment and cycle requirements |
| Mechanical Properties | General-purpose and high-strength / high-tear formulations available | Use grade-specific tensile, elongation and tear data |
| Electrical Properties | Electrical insulation and high-voltage composite-insulator grades available | Check dielectric, tracking and erosion test requirements |
| Temperature Resistance | Depends on formulation and application conditions | Use the operating-temperature value stated in the selected grade TDS |
| Compliance Support | RoHS, REACH, FDA, LFGB, PAHs and UL-related support on applicable grades | Do not apply one certification claim to every HTV grade |
| Documents | TDS, SDS, COA and selected certification/test documentation | Provide grade-specific files to buyers |
| Packaging | Typical Yakows HTV product pages list 20 kg carton / pallet packaging | Confirm packaging for the exact product ordered |
How HTV Silicone Rubber Is Processed
HTV silicone rubber is supplied as a high-consistency compound and selected according to the molding or extrusion process used by the customer. Cure conditions, compound handling and post-curing requirements vary by formulation.
Yakows supports material selection for compression molding, extrusion, transfer molding and other heat-curing production processes. For stable mass production, curing temperature and time should be taken from the selected product TDS rather than treated as one fixed value for all HTV silicone rubber.
Compression Molding
Common for O-rings, gaskets, pads, buttons, keypads, electrical parts and general molded components.
Extrusion
Used for profiles, cords, seals, tubing, wire and cable insulation and other continuous silicone products.
Transfer Molding
Suitable for selected compounds and more complex molded structures where controlled material transfer is required.
Specialized Molding
Electrical insulation and composite-insulator production can require application-specific equipment and cure systems.
Where Is HTV Silicone Rubber Used?
Yakows HTV silicone rubber serves both conventional molded-product markets and specialized electrical insulation applications. The material grade should be matched to the actual service environment instead of selecting only by hardness.
Why buyers choose HTV silicone rubber
- Reliable weather and UV aging resistance for outdoor service
- Stable elasticity across a wide working-temperature range
- Electrical insulation options for power-industry applications
- Multiple grades for sealing, molding, extrusion and special compliance needs
HTV Silicone Rubber for Composite Insulators
Yakows HTV silicone rubber has been used in outdoor composite-insulator projects where long-term electrical reliability, hydrophobicity, UV resistance and mechanical durability are critical. Below are two representative project cases already presented on the Yakows website.
Russia – High-Voltage Composite Insulator Project
Yakows worked with a leading Russian utility company on a high-voltage composite insulator application. The project required a silicone housing material capable of maintaining stable insulation performance under severe outdoor climatic conditions.
The insulators were exposed to extreme seasonal temperature fluctuations of approximately -40°C to +40°C together with long-term ultraviolet exposure. These conditions increased the risk of surface aging and reduced reliability of conventional silicone coatings over time.
Yakows supplied HTV silicone rubber selected for strong hydrophobicity, tracking resistance and thermal stability. Its tear resistance and elongation also supported efficient molding around complex insulator sheds and cores, helping improve processing and assembly consistency.
According to the customer feedback published on the Yakows site, the project achieved lower leakage-current occurrence and reduced maintenance frequency, while improving long-term reliability under harsh climatic conditions.
India – Outdoor Composite Insulator Project
A major Indian transmission operator required an HTV silicone rubber solution for outdoor composite insulators installed in a demanding transmission environment with frequent moisture exposure and contamination.
Pollution accumulation combined with frequent wet conditions increased the risk of flashover on outdoor insulators. The customer needed a silicone material that could maintain surface hydrophobicity and reliable dielectric performance through monsoon conditions and hot-season operation.
Yakows HTV silicone rubber was selected for hydrophobicity transfer, tracking resistance and UV-aging stability. Its flexibility and mechanical strength supported coating and molding around complex insulator geometries, while its thermal and dielectric properties were suited to outdoor transmission service.
Based on the existing Yakows case description, the customer reported reduced maintenance downtime, improved flashover performance and longer insulator service life after using the HTV silicone rubber solution.
HTV Silicone Rubber vs Liquid Silicone Rubber (LSR)
Yakows supplies both HTV and LSR. The main difference is not simply temperature resistance: the two materials have different physical forms, mixing systems and manufacturing processes.
| Feature | HTV / HCR Silicone Rubber | Liquid Silicone Rubber (LSR) |
|---|---|---|
| Material Form | Solid, high-consistency compound | Two-component liquid silicone system |
| Typical Processing | Compression molding, extrusion, transfer molding | Liquid injection molding |
| Curing System | Peroxide or platinum depending on grade | Primarily platinum-catalyzed addition curing in a heated mold |
| Material Handling | Solid compound; may require preforming or mixing according to process | Metered and mixed as a two-component liquid system |
| Typical Applications | Industrial seals, profiles, molded parts, electrical insulation and composite insulators | Precision molded medical, consumer, food-contact and technical components |
Yakows Silicone Rubber Manufacturing Capability
Yakows' website presents a 20,000 m² manufacturing base in Dongguan, an R&D team with long-term silicone-industry experience, and an integrated capability covering silicone materials, mold development and custom component production.
- Application-oriented material development Formulations can be selected or adjusted around molding, sealing, electrical and appearance requirements.
- Custom hardness and color Multiple hardness and color options are available across Yakows HTV product families.
- Technical and sample support Material selection, sample testing, curing-system selection and production troubleshooting can be supported.
- Quality documentation TDS, SDS, COA and selected compliance/test documentation can be supplied according to product and project.
How to Choose the Right HTV Silicone Rubber Grade
Before requesting a sample, provide the following information so the technical team can narrow the grade selection and reduce repeated testing.
- Final Application Tell us whether the material will be used for a gasket, molded part, cable, composite insulator, food-contact part, medical component or another application.
- Required Hardness Specify your target Shore A hardness, acceptable tolerance and whether softness, sealing pressure or structural stiffness is the priority.
- Processing Method Compression molding, extrusion, transfer molding or other production process.
- Curing System Confirm whether peroxide curing, platinum curing or a customer-specific cure requirement is needed.
- Performance Targets Temperature exposure, tensile strength, tear strength, elongation, electrical properties, flame resistance or anti-yellowing performance.
- Compliance & Documentation Confirm required FDA, LFGB, RoHS, REACH, PAHs, UL-related testing, TDS, SDS or COA before material approval.
TDS, SDS, COA & Compliance Support
For B2B material evaluation, technical documentation should be connected to the exact HTV silicone rubber grade rather than presented only as general company certificates.
Depending on the product and project, Yakows product pages currently reference support for documents and compliance including TDS, SDS, COA, RoHS, REACH, FDA, LFGB, PAHs and UL-related flame-retardant requirements.
HTV Silicone Rubber FAQ
What does HTV mean in silicone rubber?
Is HTV silicone rubber the same as HCR?
What hardness is available for Yakows HTV silicone rubber?
What processing methods are suitable for HTV silicone rubber?
How is HTV silicone rubber cured?
Can Yakows HTV silicone rubber be used for composite insulators?
Does Yakows provide food-grade and medical-grade HTV silicone rubber?
What documents can be provided with HTV silicone rubber?
How do I select the correct HTV silicone rubber grade?
Need Help Selecting an HTV Silicone Rubber?
Send your application, hardness, processing method and compliance requirements to Yakows for grade recommendation, technical data and sample evaluation.