The first company in Taiwan to develop the Oil Seal. The first choice of OEMs around the world.

At KOK, we take pride in our customer relationships and in our commitment to innovation. For over 60 years, we have developed proprietary parts for original equipment manufacturers in the automotive, motorcycle and scooter, and other transportation and heavy duty industries.

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KOK stands for Kyo Oil-Seal Kaisha, a Japanese translation meaning Kyo Oil Seal Company.

At KOK International, we’ve been driven by one mission since 1963: to deliver oil seals and polymeric solutions that set the standard for efficiency, reliability, and innovation.

What We Do

We design and manufacture high-precision oil seals and polymeric components across industries from automotive and motorcycle OEMs to industrial machinery and aerospace.

Our products are trusted by OEMs and aftermarket partners alike for their consistency, durability, and performance.

Why Trust Us

KOK has over 60 years of expertise in rubber and sealing technology
KOK is the first oil seal manufacturer in Taiwan
KOK has decades-long partnerships with leading OEMs in the automobile and motorcycle industries
KOK has a global reputation for precision engineering and reliability

How We Work

Our foundation rests on three principles:

Integrity — doing business with honesty and transparency. Supplying high quality products and solutions that last.
Efficiency — delivering solutions that reduce waste and maximize performance
Innovation — continually refining processes and developing new technologies to meet modern demands

Today

What began as a breakthrough in sealing technology has grown into a trusted global partner. From the earliest machines we engineered in-house to the advanced manufacturing systems we use today and continue to invest in, our focus remains the same: to help our customers achieve more with dependable, precision-made solutions.

Customer Commitment

At KOK, we don’t just deliver parts — we deliver confidence. Our commitment to innovation, integrity, and customer success means that when you need a sealing or vibration dampening solution, KOK is the name that comes to mind.

Quality Comes Standard at KOK

KOK was the first in the industry in Taiwan to earn two distinctive quality certifications, QS9000 and ISO 9001, and is still the first choice of many OE manufacturers around the world. See our industry specific quality certifications below.

QS9000

A quality standard developed by a joint effort of the "Big Three" American automakers, General Motors, Chrysler and Ford in the 1990s. This standard has been retired, and replaced with IATF 16949.

IATF 16949

A quality standard with criteria of a strong orientation to the customer, including a number of consolidated customer specific requirements.

ISO 9001

Sets the criteria for a quality management system used by manufacturers globally, and is the only standard for quality management for which certification can be earned.

Our Quality Philosophy: Best Quality. Customer First.

Our philosophy means to meet the demands of our customers – providing solutions for customers with even the highest quality requirements.

Quality, Efficiency, and Longevity

Made exactly for you by KOK

From clean room production of completely custom designed seals to high-quality and high-volume metal parts, KOK can produce the parts you need to your exact requirements.

See our capabilities here.

KOK Sustainability Promise

We focus on the future.

Innovation is at the core of everything we do. That means finding innovative ways to reduce waste, improve processes, and a sustainable future for our customers, employees, communities, and the planet.