1. Executive Summary
The global silicone rubber market is projected to reach approximately USD 8.5–8.7 billion in 2025, with steady integration across automotive, construction, electronics, and transportation sectors. High-temperature vulcanizing silicone rubber (HTVSR) accounts for 45–50% of this market, with anticipated growth of 1–2% annually. The high-temperature silicone market alone is valued at approximately USD 2.8 billion and is expected to reach USD 4.6 billion by 2033, growing at a CAGR of 5.7%.
Yet for engineers and manufacturers specifying silicone rubber compounds, the challenge is not finding a silicone rubber manufacturer—it is finding a partner who understands the full spectrum of performance requirements: flame retardancy, oil resistance, extreme temperature tolerance, low compression set, high tear strength, and processability. One compound cannot satisfy all these demands; the solution lies in a comprehensive portfolio engineered for specific application needs.
Sanesil® silicone rubber compounds, developed by Sanexin Polymer—a company with deep compounding expertise and one of China’s Top 5 custom compounding facilities—represent a complete family of high-performance silicone rubber solutions developed by a trusted silicone rubber manufacturer China. From general-purpose molding and extrusion grades to specialty compounds for flame retardancy, oil resistance, extreme temperatures ( 100°C to 315°C), and high tear strength, the Sanesil® portfolio is engineered for real-world production and field performance.
This report provides a systematic overview of the Sanesil® product family, detailing the technical specifications, application fit, and the unique manufacturing foundation that enables these solutions.
2. The Sanesil® Product Philosophy: Application-Specific Engineering
Silicone rubber is valued for its broad temperature stability ( 60°C to +250°C), chemical resistance, electrical insulation properties, and ease of coloration. However, the “one-size-fits-all” approach fails in demanding applications where specific performance attributes—flame retardancy, oil resistance, extreme temperature capability, or mechanical strength—are non-negotiable.
The Sanesil® portfolio is structured around application-specific performance families, allowing customers to select compounds optimized for their exact requirements without compromising on processability or cost-effectiveness. As a leading silicone rubber compound manufacturer, Sanexin understands that each application demands a tailored approach.
3. Product Portfolio Overview
The Sanesil® silicone rubber compound family is organized into distinct series, each engineered for specific performance priorities and processing methods.
3.1 General Purpose Series: SR1XXU, SR2XXU, SR5XXU, SR7XXU
These series are pre-mixed silicone rubber compounds designed for general-purpose applications with balanced mechanical properties. They vulcanize under heat after the addition of a curing agent selected according to processing requirements.
SR1XXU Series – Molding Grade:
- Good balanced properties with excellent appearance
- Fácil de procesar y desmoldar, no se pega a los rollos
- Good thermal stability up to 200°C
- Colores brillantes fáciles de obtener
- Applications: Molded articles, keypads, sealing rings, O-rings, swimming caps
| Grado | Dureza (Shore A) | Tensile (MPa) | Elongación (%) | Tear (kN/m) | Rebote (%) |
| SR130U | 29 | 8.0 | 712 | 13 | 73.2 |
| SR140U | 41 | 6.9 | 534 | 14 | 73.3 |
| SR150U | 51 | 8.3 | 420 | 16 | 65.9 |
| SR160U | 59 | 8.8 | 356 | 18 | 59.6 |
| SR170U | 70 | 8.1 | 248 | 20 | 56.6 |
Curing: 1.1% 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane (45%), 175°C × 5 min
SR2XXU Series – Extrusion Grade:
- Good balanced mechanical properties optimized for extrusion
- Good appearance, easy to process
- Vacuum-packed for extrusion applications
- Applications: Seals, sheet, tube, calendered sheet
| Grado | Dureza (Shore A) | Tensile (MPa) | Elongación (%) | Tear (kN/m) | Rebote (%) |
| SR230U | 31 | 7.1 | 690 | 12 | 73.9 |
| SR240U | 41 | 8.1 | 587 | 14 | 70.3 |
| SR250U | 50 | 9.0 | 390 | 17 | 68.5 |
| SR260U | 59 | 9.2 | 332 | 16 | 59.9 |
| SR270U | 69 | 8.6 | 238 | 18 | 56.5 |
| SR280U | 79 | 7.7 | 186 | 16 | 52.0 |
Curing: 1.1% 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane (45%), 170°C × 10 min
SR5XXU Series – High Mechanical Strength:
- Good mechanical properties with excellent appearance
- No post-cure or slight post-cure required
- Applications: Molding articles requiring good mechanical properties and appearance
| Grado | Dureza (Shore A) | Tensile (MPa) | Elongación (%) | Tear (kN/m) |
| SR515U | 16 | 5.6 | 1210 | 14 |
| SR520U | 20 | 5.8 | 1123 | 15 |
| SR530U | 30 | 8.1 | 835 | 12 |
| SR540U | 41 | 9.2 | 708 | 17 |
| SR550U | 50 | 8.8 | 573 | 17 |
| SR560U | 60 | 8.9 | 450 | 18 |
| SR570U | 70 | 8.5 | 383 | 19 |
| SR580U | 80 | 8.1 | 221 | 16 |
Curing: 1.1% 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane (45%), 175°C × 5 min
SR7XXU Series – High Transparency:
- Fácil de procesar, no se pega a los rollos, fácil de desmoldar.
- Good mechanical properties with high transparency
- Bright colors easily obtained with color bases
- Applications: Molding articles with good comprehensive properties
| Grado | Dureza (Shore A) | Tensile (MPa) | Elongación (%) | Tear (kN/m) |
| SR730U | 32 | 11.7 | 948 | 22 |
| SR750U | 50 | 12.1 | 701 | 28 |
| SR760U | 59 | 11.6 | 682 | 28 |
| SR770U | 70 | 11.2 | 532 | 34 |
| SR780U | 81 | 10.4 | 301 | 29 |
Curing: 1.25% 2,4-dichlorobenzoyl peroxide (50%), 115°C × 8 min, post-cure 200°C × 4h
3.2 High Rebound & Low Compression Set Series: SR8XXU
These compounds are engineered for applications requiring high rebound resilience and low compression set.
Key properties:
- High rebound and low compression set
- Fácil de procesar y desmoldar, no se pega a los rollos
- Bright colors easily obtained with color bases
- Applications: Oil rings, gaskets, rollers, and other articles requiring high rebound and low compression set
| Grado | Dureza (Shore A) | Tensile (MPa) | Elongación (%) | Tear (kN/m) | Compression Set (177°C×22h, %) | Rebote (%) |
| SR830U | 34 | 5.6 | 576 | 8 | 10 | 67 |
| SR840U | 41 | 6.1 | 435 | 9 | 7 | 72 |
| SR850U | 50 | 8.9 | 442 | 12 | 9 | 66 |
| SR860U | 63 | 8.5 | 357 | 18 | 10 | 58 |
| SR870U | 71 | 8.9 | 289 | 16 | 11 | 53 |
| SR880U | 80 | 7.2 | 175 | 11 | 9 | 49 |
Curing: 1.1% 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane (45%), 175°C × 5 min
4. Specialty Silicone Rubber Compounds
4.1 Flame Retardant Series: SR64XXUFR, SR6960UFR, SR960U
SR64XXUFR Series – Halogen-Free Flame Retardant
This series is a caucho de silicona ignífugo compound with excellent extrusion performance.
Key properties:
- Excellent compound strength
- Unstructured in long-term storage
- Good flame retardancy – flame retardant silicone rubber UL94 V0 grade
- Low compression set
- Milky appearance, easy to pigment
- RoHS 2.0 compliant
| Grado | Dureza (Shore A) | Tensile (MPa) | Elongación (%) | Density (g/cm³) | Flame Rating | Ambiental |
| SR6450UFR | 52 | 6.7 | 380 | 1.49 | UL94 V-0 | Halogen-free, RoHS |
| SR6470UFR | 72 | 7.2 | 175 | 1.52 | UL94 V-0 | Halogen-free, RoHS |
Applications: Flame-retardant products such as seals, wires, etc.
Curing: 1.2% 2,5-dimethylbis(tert-butylperoxy)hexane (45%), 180°C × 5 min
SR6960UFR Series – EN 45545-2 Compliant for Railway Applications
This series is specifically engineered for public transportation applications. As a low smoke zero halogen silicone rubber for rail, it meets the most stringent safety requirements.
Key properties:
- Excellent compound strength
- Superior flame retardancy – Complies with EN 45545-2 R1 HL3
- Low smoke emission – Minimizes smoke density and volume during combustion
- Non-toxic curing/combustion gases
- Wide service temperature range: 55°C to 250°C
| Propiedad | Valor |
| Dureza (Shore A) | 66 |
| Resistencia a la tracción | 8.2 MPa |
| Alargamiento a la rotura | 312% |
| Densidad | 1.36 g/cm³ |
| Flame Retardant Level | EN 45545-2 R1/HL3 |
| Compression Set (175°C × 22h) | 25% |
- Milky white appearance, easy to pigment
- Halogen-free, RoHS 2.0 compliant
Curing: 1.2% di(2,4-dichlorobenzoyl) peroxide (DCBP), 120°C × 5 min
Applications: Flame-retardant components in public transportation systems – seals, gaskets, etc.
SR960U Series – Electrical Insulation Grade
This series is a pre-mixed compound for electrical insulating silicone rubber.
Key properties:
- Good tracking and erosion resistance
- Buena hidrofobicidad e ignifugación
- Fácil de procesar y desmoldar, no se pega a los rollos
- Buenas propiedades de aislamiento eléctrico
| Propiedad | Valor |
| Dureza (Shore A) | 63 |
| Densidad | 1.53 g/cm³ |
| Resistencia a la tracción | 5.4 MPa |
| Alargamiento | 278% |
| Resistencia al desgarro | 12 N/mm |
| Volume Resistivity | 5.3×10¹⁴ Ω·cm |
| Dielectric Strength | 21.5 kV/mm |
- Rendimiento superior del proceso de moldeo
- UL94 V-0 rated
- Tracking and erosion resistance: ≤2.5 mm (IEC 60587 TM1 A4.5)
Curing: 1.2–1.5% DMDBH, 175°C × 5 min
Applications: Insulating products of different voltage grades; all types of electrical insulating equipment for outdoor use – composite insulators, surge arresters, bushings, etc.
5. Oil-Resistant Silicone Rubber Compounds
5.1 SR2100UOR Series – Oil-Resistant Silicone
This series offers excellent oil resistance and low compression set, positioning Sanexin as a trusted oil resistant silicone rubber supplier para aplicaciones de sellado exigentes.
Key properties:
- Excellent physical strength of raw rubber
- Barely structured in long-term storage
- Low compression set
- Good thermal stability up to 225°C
- Excellent resistance to oil (low swelling)
- Compatible for mixing with other rubbers
| Grado | Dureza (Shore A) | Tensile (MPa) | Elongación (%) | Tear (kN/m) | Density (g/cm³) |
| SR2150UOR | 51 | 7.8 | 350 | 16 | 1.19 |
| SR2160UOR | 62 | 7.5 | 300 | 15 | 1.25 |
| SR2170UOR | 71 | 8.2 | 220 | 15.2 | 1.32 |
| SR2180UOR | 82 | 8.5 | 160 | 13.2 | 1.37 |
After 225°C × 70h aging:
| Grado | Dureza | Tensile (MPa) | Elongación (%) | Compression Set (177°C×22h, %) |
| SR2150UOR | 52 | 7.7 | 320 | 10.0 |
| SR2160UOR | 62 | 7.5 | 280 | 10.9 |
| SR2170UOR | 72 | 8.3 | 190 | 8.2 |
| SR2180UOR | 83 | 8.6 | 150 | 7.9 |
Oil Resistance (ASTM No. 903 Oil, 150°C × 70h):
| Grado | Cambio de dureza | Tensile (MPa) | Elongación (%) | Cambio en el volumen (%) |
| SR2150UOR | 36 | 3.5 | 430 | 37 |
| SR2160UOR | 48 | 3.8 | 400 | 35 |
| SR2170UOR | 56 | 5.7 | 340 | 36 |
| SR2180UOR | 69 | 6.3 | 274 | 34 |
Curing: 1.2% 2,5-dimethylbis(tert-butylperoxy)hexane (50%), 175°C × 5 min, post-cure 200°C × 4h
Applications: Mechanical rubber goods requiring low compression set and good oil resistance; suitable for molding, injection, and extrusion
5.2 SR2400UOR Series – Enhanced Oil Resistance & High Temperature
This series offers excellent oil resistance with low swelling, good thermal stability up to 250°C, and low compression set.
Key properties:
- Excellent physical strength of raw rubber
- Low compression set
- Good thermal stability up to 250°C
- Excellent resistance to oil (low swelling)
- Compatible for mixing with other rubbers
| Grado | Dureza (Shore A) | Tensile (MPa) | Elongación (%) | Tear (kN/m) | Density (g/cm³) |
| SR2452UOR | 51 | 6.5 | 381 | 17.5 | 1.27 |
| SR2462UOR | 62 | 7.1 | 246 | 19.7 | 1.29 |
| SR2472UOR | 72 | 7.5 | 205 | 19.7 | 1.33 |
After 200°C × 4h aging:
| Grado | Dureza | Tensile (MPa) | Elongación (%) | Compression Set (175°C×22h, %) |
| SR2452UOR | 52 | 6.4 | 327 | 12 |
| SR2462UOR | 63 | 6.5 | 210 | 12 |
| SR2472UOR | 73 | 7.4 | 192 | 14 |
After 250°C × 72h aging:
| Grado | Dureza | Tensile (MPa) | Elongación (%) |
| SR2452UOR | 52 | 7.2 | 292 |
| SR2462UOR | 63 | 7.5 | 220 |
| SR2472UOR | 73 | 7.8 | 190 |
Oil Resistance (ASTM No. 903 Oil, 150°C × 70h):
| Grado | Cambio de dureza | Cambio en el volumen (%) |
| SR2452UOR | 32 | 38 |
| SR2462UOR | 44 | 37 |
| SR2472UOR | 57 | 35 |
Curing: 1.2% 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane (45%), 180°C × 5 min, post-cure 200°C × 4h
Applications: Products requiring low compression set, oil resistance, and temperature resistance; suitable for molding, injection, and extrusion
6. High-Temperature Silicone Rubber: SR1200UTH Series
This series is designed for extreme high-temperature applications, serving as high temperature silicone rubber up to 300°C (and beyond, up to 315°C) for the most demanding thermal environments.
Key properties:
- Excelente resistencia del caucho bruto
- Not easily structured in long-term storage
- No need for secondary vulcanization
- Good thermal stability – heat resistance up to 315°C
- Compatible for mixing with other silicone rubber
| Grado | Dureza (Shore A) | Tensile (MPa) | Elongación (%) | Tear (kN/m) | Density (g/cm³) | Linear Shrinkage (%) |
| SR1240UTH | 40 | 7.0 | 610 | 18 | 1.09 | 3.6 |
| SR1260UTH | 59 | 8.6 | 398 | 24 | 1.18 | 3.3 |
| SR1270UTH | 71 | 8.5 | 450 | 19 | 1.19 | 3.2 |
| SR1280UTH | 80 | 8.0 | 450 | 22 | 1.21 | 3.0 |
Curing: 1.2% 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane (45%), 180°C × 5 min
Aplicaciones: High temperature silicone rubber for kitchen utensils, UL heat-resistant cables, hot stamping rollers, gaskets, and other applications requiring high temperature resistance
7. High Tear Strength Silicone Rubber: SR32XXU / SR33XXU Series
These series offer high transparency and exceptional tear resistance, specifically formulated as high tear strength silicone rubber for molding aplicaciones.
Key properties:
- Transparent appearance, excellent physical performance
- Resistance to crepe hardening in long-term storage
- Low compression set
- High tear resistance
- Excellent process performance
- Compatible for mixing with other rubbers
SR32XXU Series – High Tear (crescent tear up to 30–40 kN/m) :
| Grado | Dureza (Shore A) | Density (g/cm³) | Aplicación |
| SR3240U | 41 | 1.10 | General high tear |
| SR3250U | 49 | 1.14 | General high tear |
| SR3270U | 71 | 1.19 | General high tear |
| SR3280U | 82 | 1.21 | General high tear |
SR33XXU Series – Super High Tear (crescent tear up to ~50 kN/m) :
| Grado | Dureza (Shore A) | Density (g/cm³) | Aplicación |
| SR3350U | 52 | 1.14 | Super high tear |
| SR3360U | 60 | 1.16 | Super high tear |
| SR3370U | 72 | 1.18 | Super high tear |
For applications requiring optical clarity combined with durability, transparent high tear silicone rubber for molding is the ideal solution. These grades provide excellent transparency while maintaining superior mechanical strength.
Curing: 1.2% 2,5-dimethylbis(tert-butylperoxy)hexane (45%), 170°C × 5 min, post-cure 200°C × 4h
Applications: Molding products with complex structures requiring high tear resistance; large-size extruded products (special cable sheaths); large-size vulcanized products (silicone rubber plates, air bags)
8. Fluorosilicone Rubber: FS2200U and FS8200U Series
Fluorosilicone rubber (FVMQ) combines the broad temperature stability of silicone with the oil and solvent resistance of fluoropolymers. The global FVMQ market is projected to grow from USD 301 million in 2025 to USD 403 million by 2031, at a CAGR of 5.0%, driven by demand from automotive and aerospace industries. Sanexin provides silicone rubber for automotive applications through its comprehensive fluorosilicone portfolio, supported by custom silicone rubber compounding for automotive industry capabilities.
8.1 FS2200U Series – High Resilience Fluorosilicone
Key properties:
- Excelente resistencia al aceite y a los disolventes polares
- Fácil de procesar y de pigmentar
- Alta resistencia
- Conjunto de compresión muy bajo
- Good heat stability up to 230°C
| Grado | Dureza (Shore A) | Tensile (MPa) | Elongación (%) | Tear (kN/m) | Rebote (%) | Density (g/cm³) |
| FS2230U | 30 | 9.7 | 498 | 17 | 30 | 1.40 |
| FS2240U | 39 | 10.4 | 410 | 17 | 27 | 1.42 |
| FS2250U | 50 | 10.4 | 358 | 18 | 27 | 1.43 |
| FS2260U | 59 | 10.1 | 295 | 17 | 26 | 1.45 |
| FS2270U | 71 | 10.0 | 254 | 18 | 26 | 1.47 |
| FS2280U | 79 | 9.1 | 200 | 17 | 25 | 1.48 |
Curing: 1.2% 2,5-dimethylbis(tert-butylperoxy)hexane (45%), 170°C × 5 min, post-cure 200°C × 4h
8.2 FS8200U Series – Extrusion-Grade Fluorosilicone
Key properties:
- Good extrusion performance
- Excellent resistance to oil and non-polar chemicals
- Low compression set
- Wide operating temperature: 60°C to 230°C
- Good processability and easily pigmented
| Grado | Dureza (Shore A) | Tensile (MPa) | Elongación (%) | Density (g/cm³) |
| FS8250U | 50 | 9.9 | 320 | 1.46 |
| FS8260U | 60 | 9.8 | 380 | 1.48 |
| FS8280U | 80 | 7.3 | 320 | 1.50 |
Curing: 1.2% 2,5-dimethylbis(tert-butylperoxy)hexane (45%), 170°C × 10 min, post-cure 200°C × 4h
Applications (both series) : Automotive industry, aerospace industry, petroleum chemical industry, military industry. Sealing materials for petroleum oil, lubricant oil, hydraulic oil, transformer oil, and non-polar chemical reagents in low and/or high temperature environments. O-rings, gaskets, fuel-line quick-connect seals, oil seals, sealing strips, diaphragms, membranes, valves, hydraulic and electrical clamp blocks. With custom silicone rubber compounding for automotive industry expertise, Sanexin delivers tailored solutions for the most demanding vehicle applications.
9. Phenyl Silicone Rubber: SR32XXUDP Series
Phenyl silicone rubber (PVMQ) offers exceptional low-temperature flexibility (down to 100°C) and radiation resistance—properties unattainable with standard silicone rubber.
Key properties:
- Resistance to crepe hardening
- Buenas propiedades mecánicas
- Excellent resistance to low temperature and radiation
- Wide operating temperature: 100°C to 250°C
- Fácil de procesar y de pigmentar
| Grado | Dureza (Shore A) | Tensile (MPa) | Elongación (%) | Tear (kN/m) | Density (g/cm³) | Temperatura frágil |
| SR3250UDP | 50 | 9.5 | 550 | 28 | 1.25 | 100°C |
| SR3270UDP | 69 | 10.2 | 400 | 35 | 1.26 | 100°C |
| SR3280UDP | 80 | 9.2 | 140 | 19 | 1.27 | 100°C |
After 225°C × 72h aging:
| Grado | Dureza | Tensile (MPa) | Elongación (%) |
| SR3250UDP | 52 | 9.2 | 400 |
| SR3270UDP | 71 | 9.6 | 310 |
| SR3280UDP | 82 | 9.0 | 120 |
After 250°C × 72h aging:
| Grado | Dureza | Tensile (MPa) | Elongación (%) |
| SR3250UDP | 56 | 5.2 | 340 |
| SR3270UDP | 75 | 5.4 | 270 |
| SR3280UDP | 85 | 5.6 | 80 |
Curing: 1.2% 2,5-dimethylbis(tert-butylperoxy)hexane (45%), 180°C × 5 min, post-cure 200°C × 4h
Aplicaciones:
- Automotive: Vehicle seal rings, oil seals, diaphragms, conduit, valve linings
- Petrochemical: High/low temperature and chemical erosion-resistant pump, valve, tank sealing products
- Aerospace: Aircraft fuel oil and lubricating oil seals, O-rings, filler, sealing rings, sensor materials, diaphragms, liner clamps
- Military: Low temperature/oil/acid resistance in harsh environments – military aircraft hydraulic system infusion bellows, special vehicle door/window seals, sensor materials
10. Manufacturing Excellence: The Sanexin Advantage
10.1 Integrated Manufacturing Capability
Como líder silicone rubber manufacturer y silicone rubber compound manufacturer, Sanexin Polymer’s manufacturing platform is built on three interconnected pillars:
Pillar 1: Dedicated Silicone Rubber Compounding
The Sanesil® product line is manufactured in purpose-built facilities with rigorous quality control at every stage—from raw material inspection to final compound testing. Each batch undergoes comprehensive physical, mechanical, and flame retardancy testing to ensure consistent performance.
Pillar 2: China’s First Dust-Free Colored Silicone Rubber Production Line
Sanexin operates China’s first dust-free colored silicone rubber manufacturing facility. Colorants are introduced in a fully enclosed, dust-free system, eliminating airborne contamination, protecting worker health, and ensuring batch-to-batch color consistency. This capability enables Sanesil® compounds to be easily pigmented to bright, consistent colors.
Pillar 3: One of China’s Top 5 Custom Compounding Facilities
Sanexin owns and operates one of the five largest custom compounding plants in China. As a custom silicone compound factory, this is the foundational technical engine behind the Sanesil® portfolio. Every compound formulation is validated in this facility using production-scale mixers, shear rates, temperatures, and cycle times that customers use—ensuring that Sanesil® compounds are not merely laboratory-proven but production-validated.
10.2 The Virtuous Cycle: Compounding Expertise Drives Product Innovation
The integration of silicone rubber compounding with custom manufacturing creates a closed-loop innovation cycle:
- R&D chemists develop new compound formulations based on real-world compounding insights
- Pilot batches are compounded in production-scale mixers—not just lab mills
- Performance data is generated using the same test methods applied to commercial compounds
- Process feedback (dispersion behavior, cure response, extrusion characteristics) informs formulation refinement
- Customer compounds are validated in the same facility before market release
10.3 Why This Matters for Customers
Sanexin’s compounding heritage provides three tangible customer benefits:
- Formulations that actually work on production equipment – Not just lab-scale successes
- Technical support grounded in real manufacturing experience – The team understands mixing constraints, cycle time pressures, and quality control challenges
- Accelerated development timelines – Recommended formulations are already pre-validated, reducing trial-and-error cycles
When you partner with a silicone rubber manufacturer China like Sanexin, you gain access to a fully integrated manufacturing ecosystem that ensures quality, consistency, and technical excellence.
11. Regulatory Compliance
| Application Requirement | Recommended Series | Key Feature |
| General-purpose molding | SR1XXU | Balanced properties, easy demolding |
| General-purpose extrusion | SR2XXU | Vacuum-packed, extrusion-optimized |
| Alta resistencia mecánica | SR5XXU | Excellent tensile and tear strength |
| High transparency | SR7XXU | Transparent, high tear strength |
| Alta recuperación, baja deformación por compresión | SR8XXU | Rebound up to 72%, low set |
| Flame retardancy (UL94 V-0) | SR64XXUFR | Halogen-free, RoHS compliant |
| Railway fire safety (EN 45545-2 HL3) | SR6960UFR | Low smoke, non-toxic gases |
| Electrical insulation | SR960U | V-0, tracking resistant |
| Resistencia al aceite | SR2100UOR / SR2400UOR | Low swelling up to 225–250°C |
| Extreme high temperature (315°C) | SR1200UTH | No post-cure required |
| High tear strength | SR32XXU / SR33XXU | Tear up to 50 kN/m |
| Extreme low temperature ( 100°C) | SR32XXUDP | Phenyl silicone, radiation resistant |
| Oil + temperature resistance | FS2200U / FS8200U | FVMQ, 60°C to 230°C |
The Sanesil® product line meets or exceeds key industry standards:
- UL94 V-0 – Flame retardancy (SR64XXUFR, SR6960UFR, SR960U)
- EN 45545-2 R1 HL3 – Railway fire protection (SR6960UFR)
- RoHS 2.0 – Restricted substances compliance
- IEC 60587 – Tracking and erosion resistance (SR960U)
- IEC 60093 / IEC 60243 – Electrical insulation properties (SR960U)
12. Portfolio Selection Guide
13. Technical FAQ
Q1: “What is the difference between the SR1XXU and SR2XXU series?”
Both are general-purpose silicone rubber compounds, but they are optimized for different processing methods. The SR1XXU series is designed for molding applications (compression molding, injection molding), offering excellent demolding properties and good mechanical balance. The SR2XXU series is optimized for extrusion—it is vacuum-packed to prevent bubble formation and formulated for stable dimensional properties during extrusion. The choice depends on your primary processing method. As a silicone rubber compound manufacturer, Sanexin provides expert guidance on grade selection.
Q2: “Which flame-retardant silicone compound should I choose—SR64XXUFR, SR6960UFR, or SR960U?”
The choice depends on your certification requirements and end-use application:
- SR64XXUFR: flame retardant silicone rubber UL94 V0 grade, halogen-free, RoHS compliant. General-purpose flame-retardant silicone for seals, wires, and molded parts.
- SR6960UFR: low smoke zero halogen silicone rubber for rail – EN 45545-2 R1 HL3 compliant, the highest safety level for railway applications. Low smoke emission, non-toxic combustion gases, service temperature 55°C to 250°C. Required for passenger rail vehicles operating in tunnels or underground.
- SR960U: Electrical insulation grade with UL94 V-0, tracking and erosion resistance, and excellent dielectric properties. Designed for outdoor electrical insulating equipment—composite insulators, surge arresters, bushings.
Q3: “Can Sanesil® compounds be pigmented to specific colors?”
Yes. All Sanesil® series are designed for easy pigmentation. The SR1XXU, SR2XXU, SR5XXU, SR7XXU, and SR8XXU series specifically note that bright colors are easily obtained with color bases. Sanexin’s dust-free colored silicone rubber production line—China’s first—ensures consistent, high-quality color matching without airborne contamination.
Q4: “What is the shelf life of Sanesil® compounds?”
Shelf life varies by series:
- SR1XXU, SR2XXU, SR5XXU, SR7XXU, SR8XXU, SR1200UTH, SR2100UOR, SR2400UOR, FS2200U, FS8200U, SR32XXUDP: Up to 12 months in original unopened packaging below 40°C
- SR960U: Up to 10 months below 30°C; best used within 3 months
- SR6960UFR: 3 months below 40°C
14. Conclusion
The silicone rubber market is expanding across automotive, construction, electronics, and transportation sectors, with demand increasingly driven by specialized performance requirements—flame retardancy, oil resistance, extreme temperature tolerance, and mechanical strength. The Sanesil® portfolio, with its comprehensive range of application-specific compounds, addresses this demand through engineered solutions, not generic products.
What distinguishes Sanesil® is not just the breadth of the portfolio but the manufacturing foundation behind it. Sanexin’s dual identity as both a silicone rubber manufacturer and one of China’s Top 5 custom compounding facilities ensures that every Sanesil® formulation is production-validated—not merely laboratory-tested. As a custom silicone compound factory, the company’s dust-free colored silicone rubber capability and decades of compounding experience provide customers with formulations that work on actual production equipment, technical support grounded in real manufacturing experience, and accelerated development timelines.
From high temperature silicone rubber up to 300°C for extreme thermal environments, to flame retardant silicone rubber UL94 V0 grade for fire-safe applications, to high mechanical strength silicone rubber for industrial rollers y high temperature silicone rubber for kitchen utensils, the Sanesil® portfolio covers the complete spectrum of silicone rubber needs. The custom silicone rubber compounding for automotive industry capabilities ensure that even the most demanding vehicle applications receive tailored solutions.
For engineers and manufacturers specifying silicone rubber compounds, the recommendation is clear: select the compound that matches your application requirements, validate it in your actual production environment, and work with a silicone rubber manufacturer China who understands both the chemistry and the compounding.
15. Resources and Contact
Technical Documentation
- Product Technical Data Sheets (TDS) for all Sanesil® series
- EN 45545-2 R1 HL3 certification documentation (SR6960UFR)
- UL94 V-0 certification documentation
- RoHS 2.0 compliance certificates
- Custom formulation development reports
- Production-scale trial documentation
Facility Visits and Sample Testing
Sanexin welcomes technical visitors to its manufacturing and compounding facilities. As a premier silicone rubber manufacturer y custom silicone compound factory, on-site visits provide an opportunity to:
- Observe silicone rubber compounding processes
- Tour China’s first dust-free colored silicone rubber production line
- Visit the Top 5 custom compounding facility and witness production-scale mixing
- Discuss custom formulation requirements with technical staff
- Review real-time production data and batch consistency records
- See Sanesil® compound processing demonstrations
- Explore custom silicone rubber compounding for automotive industry soluciones
Sample requests for laboratory evaluation and production trials are available upon request. Sanexin offers technical support during customer scale-up and formulation optimization—including on-site assistance if required. Whether you need high temperature silicone rubber up to 300°C, flame retardant silicone rubber UL94 V0 grade, o low smoke zero halogen silicone rubber for rail, the technical team is ready to support your specific requirements.
Contact Information
Manufacturing Plant:
Camino Baishou, Distrito Norte de la Zona de Desarrollo Económico de Xuan Zhou
Ciudad de Xuancheng, Provincia de Anhui, China
Página web: www.sanezenrubber.com
Email: yorichen@sanezen.com (General Inquiries)
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