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Rubber compounds

Silicone rubbers have properties of both inorganic and organic materials. They are composed of unique silicone gums and high-purity silica. Silicone rubbers offer many outstanding features not found in other organic rubbers.


Heat and cold resistance

At 150°C there is almost no change in physical properties, and they maintain elasticity at temperatures at which typical organic rubbers become brittle.

Weather resistance

Silicone rubbers can be exposed to UV rays, wind, and rain for long periods with almost no change in physical properties.

Oil resistance, solvent resistance, chemical resistance

Silicone rubbers have superior oil resistance at high temperatures. They also have outstanding resistance to solvents and other chemicals, and are nearly impervious to polar organic compounds and dilute acids and alkalis.

Electrically insulative

They are stable over a wide range of temperatures and frequencies. And even when immersed in water, there is almost no decline in performance.

Compression set

They are stable over a wide temperature range (-60°C to +250°C).

Transparency and coloring

Silicone rubbers are highly transparent, meaning they can be easily colored with pigments.

Typical Products

Application/Type Grade Appearance Features
General molding KE-931-U Milky white translucent FDA (21CFR177.2600), BfR
KE-941-U Milky white translucent
KE-951-U Milky white translucent
KE-961-U Grayish white
KE-971-U Grayish white
KE-981-U Grayish white
KE-961T-U Milky white translucent
KE-971T-U Milky white translucent
silicone rubber
KE-9590-U Milky white translucent Pick-up & feed roller
KE-5590-U Milky white translucent
Dynamic fatigue durability KE-9511-U Milky white translucent Keypad for vehicle, etc.
KE-5151-U Milky white translucent
KE-541-U Milky white translucent Tube for beverage etc.
KE-551-U Milky white translucent
KE-561-U Milky white translucent
KE-571-U Milky white translucent
KE-581-U Milky white translucent
For tube KE-1551-U Milky white translucent Transparent tube
KE-1751-U Milky white translucent
KE-153-U Milky white translucent
KE-174-U Milky white translucent
Heat resistant KE-552-U Light tan Microwave oven window gasket, etc.
KE-582-U Light tan
Hermetic heat resistant KE-552B-U Pale yellow Defroster wire of regrigerators, etc.
For very low temperature application KE-136Y-U Pale yellow Gasket for cooling washer, etc.
KE-186-U Milky white translucent
Low hardness,
high elongation
KE-131-U Milky white translucent Baby nipple, etc.
KE-520-U Milky white translucent
KE-530B-2-U Milky white translucent
KE-540B-1-U Milky white translucent
Low compression set KE-850-U Milky white translucent Automotive o-ring, etc.
KE-870-U Grayish white
KE-880-U Grayish white
KE-890-U Grayish white
High strength KE-655-U Grayish white Automotive plug boots
KE-555-U Pale yellow High strength gaskets for automobile, etc.
KE-575-U Pale yellow
Steam resistant KE-7511-U Pale yellow Gasket for thermos and rice cooker, etc.
KE-7611-U Pale yellow
KE-7711-U Pale yellow
For transfer rolls KE-765-U Pale yellow
For electric wire KE-1265-U Grayish white Electric heater wire for rice cooker, Ignition wire
KE-5615-U White
KE-6080-U Umber brown
For power connector KE-7211-U Light gray Cable accessories
KE-7212-U Gray
KE-7213-U Blue-white
X-30-3893-U Black
Vibration control KE-5550-U Pale yellow Muffler hanger, engine mount for behicle
KE-501EM-U Milky white translucent
Oil breeding KE-503-U White Automotive wire seal
KE-5042-U White
KE-505-U Grayish white
Electric conductive KE-3601SB-U Black EMI gaskets, etc.
KE-3711-U Black
KE-3801M-U Black
Flame resistant KE-5612G-U Grayish black Non-flammable parts for consumer electronics
KE-5612E-U Grayish black
KE-5620BL-U Black
KE-5620W-U White
KE-5634-U Translucent

Fluorosilicone rubber

Application/Type Grade Appearance Features
Solvent resistant FE-241-U Milky white translucent Flame-resistant diaphragms, check valves, gaskets
FE-251-U Pale yellow
FE-261-U Pale yellow
FE-271-U Grayish white
FE-351-U Pale yellow High tear-strength types
FE-361-U Pale yellow
FE-451-U Pale yellow Copolymer

SEP rubber

Application/Type Grade Appearance Features
High durability SEP-1711-U Yellow General grade
SEP-1721-U Pale yellow Heat-resistant grade
SEP-1731-U Gray General grade for extrusion molding
SEP-363-U Black Flame-resistant grade
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