Technology that accelerates future life
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KCC SILICONE is the only company in Korea that manufactures all silicone products from raw materials to EM, HCE, and LSR.

LSR

  • Electronics / Home Appliances
  • Automotive
  • Consumer Goods
  • Health care
  • Textile coating
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OA Roller
Many rollers for OA equipment such as printers and copiers are currently being manufactured by applying silicone. LSR is a high heat-resistant product that can withstand a temperature of about 200℃ for a long time, and has a low compression shrinkage rate to ensure long-term printing reliability. The OA Roller is manufactured by enclosing the LSR on a metal core rod such as aluminum or SUS. In this case, it is important to attach the rod and LSR, and we supply a separate primer product.

Product list

Product Test method
Mixing ratio A:B = 1:1 A:B = 1:1
Appearance ASTM E 1767 Reddish Brown Reddish Brown
Viscosity [Pa·s]*1 ASTM D 4287 30 / 28 32 / 30
Specific Gravity ASTM D 792 1.06 1.07
Hardness [Asker C] ASTM D 2240 62 68
Tensile strength [MPa] ASTM D 412 4.0 5.0
Elongation [%] ASTM D 412 200 150
Compression set [%] *2 ASTM D 395 7 7
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For HVI (High Voltage Insulator)
HCE for HVI registers excellent tracking, arc resistance with high electrical insulation. Furthermore, due to its excellent resistance to UV, weather and chemicals, it remains unchanged in various external natural environments (high temperature/humidity. marine/alpine). It is also widly used for electrical insulators, Surge Arrest, Hollow core, etc.
Insulators
Since liquid silicone is easy for injection molding and is simple to work with, it helps to improve productivity. Silicone is put to various applications such as insulators and surge arresters due to its excellent insulating properties, weather resistance and tracking resistance.
Hollow-core insulator
Hollow-core insulators are used as insulators for high voltage devices such as arrestors and bushings. It has excellent electrical properties such as tracking resistance and arc resistance, and is suitable for injection molding because of its low viscosity and excellent flowability.
Cable accessories
Safety comes first for cable accessories since they are buried outdoors or underground and used for a long time. We provide liquid silicone for insulation and semi-conductors that have been verified by our customers.
Primer
LSR has the disadvantage of being difficult to attach to plastics or non-ferrous metals such as FRP, TPU, or PE, so primer is a must-have product. The primer is sprayed or coated on the surface of the substrate and cured at an appropriate temperature. Our primer provides excellent adhesion to FRP and silicone.

Product list

Product Test method Insulator Hollow-core
Insulator
Mixing ratio A:B = 1:1 A:B = 1:1 A:B = 1:1
Appearance ASTM E 1767 Gray, Light gray Light gray Light gray
Viscosity [Pa·s]*1 ASTM D 4287 65 / 65 200 / 200 30 / 25
Specific Gravity ASTM D 792 1.08 1.11 1.15
Hardness [Shore A] ASTM D 2240 42 49 40
Tensile strength [MPa] ASTM D 412 6.0 8.0 7.5
Elongation [%] ASTM D 412 400 500 400
Tear strength [N/mm] ASTM D 624 B 20 30 25
Dielectric Strength [kV/mm] ASTM D 149 25 25 25
Product Test method Cable Accessories
Mixing ratio A:B = 1:1
Appearance ASTM E 1767 Translucent
Viscosity [Pa·s]*1 ASTM D 4287 80 / 70
Specific Gravity ASTM D 792 1.08
Hardness [Shore A] ASTM D 2240 40
Tensile strength [MPa] ASTM D 412 7.0
Elongation [%] ASTM D 412 550
Tear strength [N/mm] ASTM D 624 B 18
Dielectric Strength [kV/mm] ASTM D 149 25
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Primer
Since LSR is difficult to adhere to plastic or non-ferrous metals such as TPU or PE, primer is a must-have product. Primer is sprayed or coated on the surface of the substrate and then cured at an appropriate temperature for use.

Product list

Product Test method
Mixing ratio 10 : 1 9 : 1
Appearance (A/B) ASTM E 1767 Translucent / Transparent brown / transparent
Viscosity [Pa·s]*1 ASTM D 4287 10 / 15 cP 0.45 / 8 cP
Solvent Silicone (Cyclosiloxane) Hydrocarbon base
Solid content [%] 50 33
Substrate TPU, PC FRP, Al, Zn, Cu,
Fe, SUS 304, glass
Curing time 60min/70℃ 20min/80℃
  • *1 : Shear Rate 10s-1

Product/Formulation Catalog

Get more details in our catalog.

Automotive Parts

Typical automotive parts using LSR include connector seals, O-rings, and gaskets. These parts are specially manufactured using Oil bleeding LSR, which exudes silicone oil over time after molding, giving water and airtightness between socket and plug of electronic equipment. In addition, it improves assembling workability by reducing the frictional force of module manufacturing. These automobile parts are getting lighter and smaller, and more sophisticated and detailed parts can be manufactured through LIMS (Liquid Injection Molding System) using LSR.

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LSR for Airbag Coating
Automotive airbags are usually manufactured by coating LSR on textile fabrics such as nylon and polyester. Airbag coated with LSR improves its durability and protects the human body by maintaining air pressure for a certain period of time when inflated. To achieve this performance, LSR for airbag coating is designed to have excellent adhesion to fabrics, and also possesses flame retardancy and high tear properties.
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Product list

LSR Type Cut & Sewn One Piece Woven(OPW) OPW Topcoat
(Friction-reducting)
Airbag
application
DAB (Driver Airbag)
PAB (Passenger Airbag)
SAB (Side Airbag)
KAB (Knee Airbag)
CAB(Curtain Airbag)
Product
Mixing ratio A:B = 10:1 A:B = 1:1 A:B = 10:1 A:B = 1:1 A:B = 2:8
Viscosity (Pa·s)
(A / B)
20 / 20 1) 33 / 34 1) 15 / 20 1) 150 / 265 1) 500 cP /
4700 cP 2)
Hardness 3)
(Shore A)
30 32 30 10
Tensile strength 4)
(MPa)
3 4.5 3.3 4.5
Elongation 5)
(%)
300 450 350 1500
  • 1) Rheometer shear rate 10 s-1 @ 25℃
  • 2) Brookfield LVDV @ 25℃
  • 3) After curing at 170℃ 10min, ASTM D 2240
  • 4), 5) After curing at 170℃ 10min, DIN 53504
  • 6) Coated fabrics, ISO 5981
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LSR for Connector Seal
Typical automotive parts include connector seals, O-rings, and gaskets. These parts are manufactured using Oil bleeding LSR, which exudes silicone oil over time after molding, giving water and airtightness between socket and plug of electronic equipment. In addition, it improves assembling workability by reducing the frictional force of module manufacturing. In line with the trend of lightweight and miniaturization of automobile parts, LIMS (Liquid Injection Molding System) using LSR can produce more sophisticated and detailed parts.
Connector seal LSR
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LSR for E-Mobility
Materials Solutions for E-Mobility and Electrification
The new era of e-Mobility requires new material solutions. KCC SILICONE offers Momentive's innovative silicone, from thermal management and battery solutions to cable and connector materials, from sensor coatings to adhesives and seals.
Solutions for E-MOBILITY and Electrical Materials

Product/Formulation Catalog

Get more details in our catalog.

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General-Purpose Liquid Silicone
General-purpose liquid silicone is a highly heat-resistant product that can withstand heat up to 200℃. In addition, it is an eco-friendly product that does not generate by-products because it uses a small amount of platinum catalyst for additional curing. Due to these characteristics, LSR is widely used in baby nipples, swimming bands, medical hoses, mouth pieces, etc.
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For Self-Adhesive
Self-adhesive liquid silicone rubber (LSR) provides primer-free adhesion to a variety of substrates. Double injection between plastic and silicone is possible, contributing to productivity improvement.
Silopren* LSR 2740

Product list

Product Test method General
Mixing ratio A:B = 1:1 A:B = 1:1 A:B = 1:1 A:B = 1:1 A:B = 1:1 A:B = 1:1
Appearance ASTM E 1767 Translucent
Viscosity [Pa·s]*1 ASTM D 4287 220 / 220 290 / 290 260 / 260 290 / 290 330 / 330 350 / 350
Specific Gravity ASTM D 792 1.11 1.11 1.11 1.10 1.12 1.13
Hardness [Shore A] ASTM D 2240 20 25 30 35 40 50
Tensile strength [MPa] ASTM D 412 6.5 6.0 7.0 8.0 8.5 9.5
Elongation [%] ASTM D 412 950 800 800 700 750 700
Tear strength [N/mm] ASTM D 624 B 40 20 35 20 35 30
Food contact*2 FDA, BfR
  • Curing condition : 170℃*10min press cure
  • *1 : Shear Rate 10s-1
  • *2 : Having technical files based on the defined test methods
  • Caution) Typical property data values should not be used as specifications
Product Test method General
Mixing ratio A:B = 1:1 A:B = 1:1 A:B = 1:1 A:B = 1:1 A:B = 1:1 A:B = 1:1
Appearance ASTM E 1767 Translucent
Viscosity [Pa·s]*1 ASTM D 4287 350 / 350 330 / 330 200 / 200 300 / 300 330 / 330 400 / 400
Specific Gravity ASTM D 792 1.12 1.13 1.12 1.13 1.12 1.14
Hardness [Shore A] ASTM D 2240 51 60 58 66 65 78
Tensile strength [MPa] ASTM D 412 9.9 9.5 8.5 9.3 9.0 8.0
Elongation [%] ASTM D 412 625 600 400 410 400 350
Tear strength [N/mm] ASTM D 624 B 40 40 40 46 40 10
Food contact*2 FDA, BfR

Product/Formulation Catalog

Get more details in our catalog.

Health Care

Silicone rubber is made of a high-viscosity silicone polymer that combines both inorganic and organic properties and high-purity silica. Characteristically biocompatible and inert, it is widely applicable to various healthcare products.

Silicone products used in medical devices include.

  • - Liquid silicone rubber (LSR) that can be easily processed by high-speed injection molding equipment with high tear strength and various hardness grades
  • - Silicone rubber compound with excellent transparency, elasticity, high temperature, and chemical stability
  • - Custom silicone formulations including antibacterial elastomers and X-ray-detectable, radiation-shielding materials
  • - Special silicone elastomers such as liquid silicone rubber with high transparency like glass and UV curable silicone elastomer that does not require high-temperature process and self-lubricating LSR
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Biopharmaceutical Production, Clinical Diagnosis and Instrumentation
Durable and resilient, silicone material is flexible and transparent, and can be subjected to multiple sterilization processes. Momentive offers a range of ISO 10993 and/or USP Class VI compliant silicones suitable for pharmaceutical applications, with no added plasticizers or other organic additives. Our Silopren* liquid silicone rubber (LSR) line cures quickly when heated on standard injection molding equipment. Our Tufel* series is suitable for applications requiring transparency and high elasticity. Click on the links below to browse our leading products and all products suitable for silicone tubing and production, clinical diagnostics, and instruments for biopharmaceuticals.
GO TO MOMENTIVE “Biopharm”
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Catheters, Drainage and Suction Devices
For drainage and insertion devices, patient comfort, ease of use, and infection prevention are essential. Our elastomeric soft silicones are available in a variety of hardness grades with no added plasticizers. Our Silopren* liquid silicone rubber (LSR), used in a variety of applications, offers high thermal stability and high tear strength, and can be easily molded into a variety of composite forms. Our Tufel* brand silicone rubber compounds are formulated with transparent, high-tear-strength, and optimized catalysts for extrusion and molding processes.
GO TO MOMENTIVE “Catheters”
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Contact Lenses
Momentive's high-performance silicone helps contact lens manufacturers successfully innovate their products and address a variety of manufacturing challenges. Momentive works with industry-leading experts to create premium silicone materials that help manufacturers create the next generation of silicone hydrogel contact lenses and enhance the experience and comfort of consumers.
GO TO MOMENTIVE “Contact Lenses"
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Fluid and Drug Delivery Device
We offer a variety of silicone materials that meet USP Grade VI and/or ISO 10993 biocompatibility standards, including pump piping and immersion-free access valves. Versatile and functional, Silopren* liquid silicone rubber (LSR) brand products feature high thermal stability and high tear strength and are available in a variety of hardness grades. Our Tufel* silicone rubber compound brand products can be used alone or blended with low-history, medium-hardness materials to extend pump life. The new self-lubricating Silopren LSR 4655SL product extends the functionality of molded parts by virtue of its extremely slippery surface.
GO TO MOMENTIVE “Fluid and Drug”
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Respiratory and Anesthesia
Masks and devices used to administer respiratory therapy and anesthetics to patients must be durable, remain functional after multiple washes, and feel comfortable in contact with the patient's skin. This function is achieved by the thermal stability and high tear resistance of silicone. Silopren liquid silicone rubber, which is put to a variety of applications, has similar rubber-free properties and excellent heat resistance, providing a long service life under dynamic stress. Our Tufel* series offers high production rates with fast cure rates and high tear strength with hard surface hardening properties, making them excellent silicones for medical tubing and hoses.
GO TO MOMENTIVE “Respiratory and Anesthesia”
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Surgical Instruments and Sterilization
Superior durability is essential for the soft grips used on surgical and dental instruments, as well as the mats and brackets for holding instruments in place during the sterilization process since they all undergo multiple sterilization processes. This requires silicones used in surgical instruments to have high thermal and chemical stability. Our Tufel* series is ideal for applications requiring transparency and complex molding flexibility, and each grade in this series comes in a variety of colors. Our Silopren* liquid silicone rubber (LSR) products quickly cure when heated on standard injection molding equipment, and our self-adhesive LSRs can be bonded to a variety of engineering thermoplastics and metal substrates without a primer or secondary process. Momentive's clear liquid silicone rubber used in surgical instruments is glass-clear and provides elastomeric functionality to light guides and endoscope constructs.
GO TO MOMENTIVE “Surgical Devices and Sterilization”
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Wearable Electronic Equipment and Devices
Wearable medical devices, such as heart rate and blood sugar monitors, must be comfortable to wear and resistant to skin oils. The Silopren LSR series is durable, flexible, and biocompatible, making it ideal for wearable medical devices where comfort and aesthetics are important. Our UV-curable silicone elastomers are used for overmolding and encapsulation of temperature-sensitive electronics used in wearable medical devices, while the 47X9 self-adhesive liquid silicone rubber provides primer-free adhesion to polycarbonate substrates.
GO TO MOMENTIVE “Wearable Electronics/Devices”
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LSR for Textile Coating
LSR for textile coating is in liquid form, so it is applied for textile coatings for clothing and other industries. It is not harmful to the human body and is sometimes applied to textile coatings for clothing in following the trend that favors the soft texture of silicone. In addition, when coated on industrial fibers such as glass fiber, it has excellent heat resistance, water repellency, and weather resistance, thereby improving durability. In some cases, LSR-coated fiber products with excellent flame retardancy performance are sometimes manufactured by mixing appropriate inorganic fillers and flame retardants.

Product list

Product Test method
Mixing ratio A:B = 10:1 A:B = 1:1 B:C = 100:3 B:SL9300B = 100:0.3 B:SL9300B = 100:0.3 B:SL9300B = 100:0.3 A:B = 1:1
Appearance ASTM E 1767 Transparent Translucent
Viscosity [Pa·s]*1 ASTM D 4287 40 / 10 30 / 120 40 / 0.12 90 190 50 130 / 130
Specific Gravity ASTM D 792 1.00 1.09 1.06 1.08 1.13 1.08 1.07
Hardness [Shore A] ASTM D 2240 35 22 14 40 60 30 39
Tensile strength [MPa] ASTM D 412 3.0 3.0 3.5 4.0 5.8 6.0 4.5
Elongation [%] ASTM D 412 200 500 500 400 200 600 380
Tear strength [N/mm] ASTM D 624 C - - - - 20 - 15
ECO PASSPORT*2
  • Curing condition : 170℃*10min press cure
  • *1 : Shear Rate 10s-1
  • *2 : Having technical files based on the defined test methods
  • Caution) Typical property data values should not be used as specifications

Product/Formulation Catalog

Get more details in our catalog.