Balanced Starting Grade
65 ± 3 Shore A with a balanced listed profile for general composite-insulator housing evaluation.
Tensile ≥4.0 MPaBreakdown ≥20 kV/mm
Electrical-Grade HTV / HCR Silicone Rubber
Silicone Rubber for Polymer & Composite Insulators
YK-3160 electrical-grade silicone rubber compounds are developed for composite insulator sheds and housings, line-post and station-post insulators, and polymer-housed surge arrester applications.
The series combines outdoor electrical performance with the mechanical strength and processing stability required for repeatable molding of high-voltage insulation components.
Material SystemSilicone HTV / HCR
Product FamilyYK-3160D · Z · G
TraitementInjection · Compression
Project SupportSample · TDS · Technical Review
01 / Insulator Application Explorer
Typical Insulator Application Scenarios Across Power, Rail & Cable Systems
Polymer insulators and related external insulation components are used across power generation, substations, transmission networks, renewable energy, industrial power systems, rail transit and high-voltage cable interfaces.
02 / Performance Logic
Match the compound to the failure risks of an outdoor insulator.
Each material property has a practical reason. The table below connects service conditions, the silicone-rubber response required and the production issue that should be checked during qualification.
Service Condition
Material Priority
What to Verify
Wet & polluted surface
Hydrophobic surface behavior plus resistance to tracking and erosion under electrical stress.
Project test method, specimen preparation, contamination severity and finished-housing performance.
High-voltage insulation
Breakdown field strength, volume resistivity and stable dielectric behavior.
Current TDS values, finished-component design and the electrical test plan used for qualification.
Outdoor aging
Resistance to UV, ozone, moisture, temperature cycling and long-term weather exposure.
Application environment, target service conditions and any customer-specific aging requirement.
Thin sheds & complex profiles
Mechanical strength, tear resistance and sufficient molding behavior for the selected geometry.
Flow, filling, venting, demolding, flash control and surface quality in the actual mold.
Repeatable mass production
Controlled hardness, cure behavior, compound consistency and dimensional stability.
Trial cycle, batch-to-batch consistency, acceptance criteria and agreed production specification.
03 / YK-3160 Product Series
Three electrical-grade HTV / HCR starting points for polymer insulator projects.
YK-3160D, YK-3160Z and YK-3160G use the same application direction but offer different listed mechanical and electrical values. The best starting grade depends on the housing design, molding process and the tests your finished insulator has to pass.
View the wider power-industry silicone rubber range
Higher Listed Electrical & Tensile Values
Keeps the same typical hardness as YK-3160D while increasing listed tensile strength, breakdown field strength and volume resistivity.
Tensile ≥4.5 MPaBreakdown ≥21 kV/mm
Higher Strength Profile
60 ± 3 Shore A and the highest listed tear, tensile, elongation and breakdown values in the current YK-3160 table.
Tensile ≥5.0 MPaBreakdown ≥22 kV/mm
Typical Properties
YK-3160 Technical Comparison
Typical values for initial grade comparison. Confirm the current official TDS, test method and agreed acceptance criteria before sample approval or mass production.
| Propriété | Unité | YK-3160D | YK-3160Z | YK-3160G |
|---|---|---|---|---|
| Dureté | Rive A | 65 ± 3 | 65 ± 3 | 60 ± 3 |
| Résistance à la déchirure | kN/m | ≥ 10 | ≥ 10 | ≥ 12 |
| Résistance à la traction | MPa | ≥ 4.0 | ≥ 4.5 | ≥ 5.0 |
| Allongement | % | ≥ 220 | ≥ 220 | ≥ 240 |
| Permanent Deformation at Fixed Extension | % | ≤ 4 | ≤ 4 | ≤ 4 |
| Densité | g/cm³ | 1.48 ± 0.03 | 1.46 ± 0.03 | 1.46 ± 0.03 |
| Breakdown Field Strength | kV/mm | ≥ 20 | ≥ 21 | ≥ 22 |
| Tracking & Erosion Resistance (1A4.5 Class) | mm | ≤ 2.5 | ≤ 2.5 | ≤ 2.5 |
| Constante diélectrique | — | ≤ 5 | ≤ 5 | ≤ 5 |
| Résistivité volumique | Ω·cm | 1 × 10¹⁴ | 2 × 10¹⁴ | 2 × 10¹⁴ |
04 / Application Fit
Where YK-3160 silicone fits in the insulator and external-insulation assembly.
The core application is the molded external housing and shed system used on outdoor composite insulation products. Component geometry and project standards still determine the final formulation and validation plan.
01 / Transmission & Distribution
Composite Suspension & Tension Insulators
Silicone rubber sheds and housings for long-rod composite insulators used on overhead power lines, where outdoor surface performance and stable molding are critical.
02 / Lines & Substations
Line-Post & Station-Post Insulators
Housing materials for post-type composite insulators exposed to mechanical load, weather, contamination and electrical stress in line and substation service.
03 / Surge Protection
Polymer-Housed Surge Arresters
Electrical-grade silicone compounds for molded arrester housings requiring outdoor durability, dielectric performance and consistent surface quality.
04 / Special Electrical Designs
Related Outdoor Insulation Components
Project-specific review can cover bushings, specialized molded insulation parts and other outdoor electrical components when the required performance and molding process are clearly defined.
05 / Grade Selection
Send the project inputs that actually change material selection.
A grade recommendation is more useful when it starts from the finished insulator and your production process instead of a single target hardness.
01Insulator Type
Suspension/tension, line post, station post, surge arrester or another molded electrical component.
02Electrical Duty
Voltage class, relevant test plan, creepage concept and any customer-specific electrical requirement.
03Environment
Pollution severity, humidity, salt fog, UV exposure, altitude and operating temperature.
04Molding Process
Injection, compression or transfer molding, mold geometry, equipment and target cycle conditions.
05Objectifs en matière de matériaux
Hardness, tear/tensile targets, color, cure behavior, processing issues and current material if available.
06Commercial Scope
Trial quantity, annual demand, destination market and documents required for purchasing review.
06 / Qualification & Supply
From material review to an approved production batch.
For B2B insulator projects, the material has to be technically suitable and commercially repeatable. Yakows supports grade comparison, trial material, production feedback, batch control and project documents before regular supply.
Requirement Review
Compare the component, process, current grade and target physical or electrical requirements.
Sample & Mold Trial
Evaluate flow, cure, demolding, surface quality and processing behavior in the intended production route.
Finished-Part Validation
Verify the molded housing and complete insulator against the agreed mechanical, electrical and project tests.
Approved Supply
Confirm specification, batch documents, packaging and delivery plan before repeat production orders.
Project documentation:TDSSDSCOABatch identificationAvailable test / compliance files
07 / Buyer Questions
Polymer insulator silicone rubber FAQ
Why is silicone rubber widely used for composite insulator housings?
Silicone rubber combines electrical insulation, flexible shed geometry, hydrophobic surface behavior and outdoor weather resistance. For polluted or wet service, tracking and erosion performance and the behavior of the complete housing design are also important.
Which YK-3160 grade should I start with?
YK-3160D is the balanced starting point in the current table, YK-3160Z lists higher tensile strength, breakdown field strength and volume resistivity at the same typical hardness, and YK-3160G lists the highest tear, tensile, elongation and breakdown values of the three. The final grade should be confirmed through molding and finished-insulator testing.
Is HTV / HCR silicone suitable for injection molding composite insulator sheds?
Yes. Electrical-grade HTV / HCR can be formulated for injection molding. Flow, scorch safety, cure profile, venting, demolding and mold geometry need to be balanced for the actual machine and insulator design.
How should tracking and erosion resistance be compared?
Use the same agreed test method, specimen preparation and acceptance criteria when comparing compounds. IEC 60587 is a common reference for evaluating tracking and erosion resistance of insulating materials under severe ambient conditions, but the project test plan should control the final comparison.
Can hardness, gray shade and processing behavior be customized?
Project-specific adjustments can be reviewed within practical formulation limits. Share the required hardness, color, mold process, current material and performance targets so feasibility can be evaluated before a trial.
What should I send to request a sample or technical recommendation?
Send the insulator type or drawing, molding method, target hardness, relevant standards or test targets, current material/TDS if available, trial quantity, expected annual demand and delivery country.
Start With the Insulator You Manufacture
Send the component, process and test target — not only a Shore A number.
Yakows can compare your requirement with the YK-3160 series and recommend a practical starting grade for sample molding and finished-component evaluation.
info@yakows.com · +86 135 4931 0838
ComponentSuspension, post, arrester or other electrical housing
ProcessusInjection / compression / transfer molding
Material TargetHardness, color, mechanical and electrical requirements
ReferenceCurrent grade, TDS, customer specification or test standard
VolumeTrial quantity, annual demand and destination market