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SEKISUI Chemical Group

A New Frontier, A New Lifestyle.

Since its founding, the SEKISUI Chemical Group has delivered a wide range of products and services to enrich people's lives and the social infrastructure. Our corporate philosophy of creating social value while responding to stakeholders' expectations, has us advancing our efforts on a daily basis.

The SEKISUI Chemical Group pledges to continue pioneering new frontiers through prominent technologies and quality, contributing to improve the lives of people around the world and global environment, and through these efforts realizing further growth.

The company's goal is to work together as one to be a company that can be trusted by the members of society and achieve continued growth.

When SEKISUI became the first Japanese company to establish operations in the U.S. fifty years ago, they had great aspirations for their business.

SEKISUI Polymer Innovations stands today as a successful result of what two cultures, united in a common goal, can achieve. At the core of our business model are two fundamental constants: Our mindset to continually improve our manufacturing quality through proven, rigorous Japanese processes (Kaizen, Monuzukari, etc.), and our commitment to educate and inspire our customers – rather than sell them.

ALLEN® Thermoplastics

A Leading Product Line That Creates Solutions

Our ALLEN® Thermoplastics product line provides a wide array of solutions that are more than just products. With ALLEN® Thermoplastics you can replace standard, heavier materials; making your products lighter, stronger, and more aesthetically pleasing.

Core Products That Raise Industry Standards

Our core products include ABS, ABSPC, TPO, and ALLEN® Alextra™ – a high-gloss, exceptionally durable sheet that raises the industry standard for aesthetics and extreme weather resistance.

Special Projects Require Custom Solutions

When pre-configured solutions just won't do, ALLEN® Thermoplastics can be customized for applications that have very specific requirements. By providing answers upfront to a few simple questions, you can help us understand your project better and determine which product is the best fit.

KYDEX® Thermoplastics

The Proven Choice For Leaders In The Industry

As part of the SEKISUI SPI product portfolio, KYDEX® Thermoplastics is the proven choice of industry leading designers and engineers. With our entire product line, customers have the ability to create and match colours across a wide range of demanding specifications for fire, smoke and toxicity.

Engineering Standards Meet Design Aesthetics

Over the years, KYDEX® Thermoplastics has earned an unrivaled reputation for quality, innovation and technical support. Our products come in over 40 grades, in unique colours, and are completely customized for the specifications of your application. Plus, our products are moldable and durable under extreme pressure delivering "best in class" performance for pressure forming.

With our multi-dimensional portfolio, the flexibility for both engineering standards and design aesthetics are found all in one thermoplastic sheet – and they will ship to meet your required timeframe anywhere in the world.

Sustainability Initatives

Committed To A Responsible Environmental Policy

At SEKISUI SPI, being "green" is no recent trend. In fact, being environmentally responsible is an essential part of our business philosophy. We strive to produce and sell all of our products while keeping with our commitment to and regard for safety, health, and environmental protection worldwide.

Did You Know...

SEKISUI SPI thermoplastics are 100% recyclable – making them a sound investment for your company AND the environment.

Our Optimized Manufacturing Processes

We always work to limit the environmental impact of our sheet manufacturing, by optimizing our processes to increase yield while reducing waste.

For instance:

Did You Know...

During the winter, heat produced in the manufacturing process is recycled to heat our manufacturing facilities.

Protecting Our Natural Resources

Air – By using clean energies such as electricity in the manufacture of thermoplastics, insignificant particulate matter or carbon dioxide is emitted from the production process into the air.

Water – During the manufacture of SEKISUI SPI thermoplastics, we limit the use of water for processing; in fact, water never comes in contact with the process. Where water is used, it is recycled internally, and no surface water is discharged.

Energy – At two of our three facilities, raw material is shipped to us in rail cars to minimize fuel consumption.

Making Sustainable Products

Our thermoplastic sheets require lower processing temperatures when compared with most other polymers in the industry. This translates into lower energy consumption, that when combined with high-efficiency motors and sophisticated temperature controls allow us to create high quality products that are also very energy efficient.

Our Standards

We Hold Our Facilities to the Highest Standards.

Our manufacturing operations and R&D facilities are certified to the ISO 14001:2004 environmental management system, as well as the ISO 9001:2008 quality management system. Our commitment to the ISO 14001:2004 standards ensures that SEKISUI SPI complies with applicable laws and regulations while minimizing how our operations affect the environment.

ISO 9001:2008 / 14001:2004

We practice and honor above and beyond best practices for our industry, business and planet.

Why? We agree with the International Standards Organization and practice Kaizen.


ISO 9001:2008: Quality management system
ISO 14001: 2004: Environmental management system

The ISO 9000 and ISO 14000 families are among ISO's (International Organization for Standardization) most widely known and successful standards ever. ISO 9001:2008 has become an international reference for quality requirements in business-to-business dealings, and ISO 14001:2004 looks set to achieve at least as much, if not more, in helping organizations meet their environmental challenges. ISO 9001:2008 is concerned with "quality management." This means what the organization does to enhance customer satisfaction by meeting customer expectations and applicable regulatory requirements, continually improving its performance in this regard. ISO 14001:2004 is primarily concerned with "environmental management." This means what the organization does to minimize harmful effects on the environment caused by its activities, and continually improving its environmental objectives.

ISO Principles


Kaizen is Japanese for "improvement" or "change for the better." We can always do better. It's what fuels us, no matter our place in our ecosystem.

Company History

A New Chapter With A Rich Story To Tell.

The story of SEKISUI SPI is one that is still being told, but our origins can be traced back to the companies that we were created from – KYDEX® Thermoplastics and ALLEN® Thermoplastics.

1965 - KYDEX® 100 sheet invented at Rohm and Haas Company, outside Philadelphia, PA. With FAR 25.853 (a) and UL recognized fire rating and other mechanical properties it was destined for aircraft interior applications.

1970 – ALLEN® Thermoplastics opened its doors in Holland, Michigan and began raising the bar in the industry by exceeding the demands of thermoformers with flexibility of our production lines, and multi-layer capabilities.

Today as SEKISUI SPI, we're a formidable competitor and an understated leader in the industries we serve.

IT'S our spirit of collaboration and innovation that drives us to create new industry and market needs, and ENABLES us to deliver more than our customers can imagine. FROM manufacturing specialty thermoplastics that are lighter, stronger and more aesthetically pleasing, to reducing development time for new materials, to unleashing design possibilities as endless as one's imagination.

Our Mission and Values

Success Through Collaboration, Innovation, And Support.

By reliably producing and delivering value-added, niche-oriented, technically driven products, we will establish KYDEX® proprietary thermoplastics and ALLEN® thermoplastics as the world's leading sheet products for thermoforming, membrane pressing, miter folding, laminating and fabricating high-performance components for demanding OEM and building product applications.

At SEKISUI SPI we understand that our future is brightest when we work with our customers, as well as with each other. Our approach brings our customers, designers, and engineers to the table with our own designLab™ and FSTLab.

We will accomplish this by:

The launch of SEKISUI SPI represents a new way to think, design and create using thermoplastics. But it's more than just a new way to do things. We have a 50-year heritage in thermoplastics, a passion to invest time in our customers' businesses and a legacy of manufacturing process innovation.


We Deliver Unique Solutions To Meet Your Every Need.

As SEKISUI SPI, our KYDEX® and ALLEN® Thermoplastics product brands are now aligned under a single entity that services 11 unique industries across five continents. With access to global resources and R&D information our designLab™ and FSTLab are able to lead more intense levels of collaboration and partnership with our customers.

Challenge Us

We grow and invest time in our customers' businesses so we can deliver more than our customers can imagine. We challenge you to bring your ideas to us, so we can make them a reality


We have a broad range of products to handle an infinite range of possibilities in a number of industries. Our products come in the colour, shape, and size you need it to – when and where you need it to.

Engage with us today.

See how we serve our customers in a variety of industries
View the services we offer to make your ideas a reality
See where to buy SEKISUI SPI Thermoplastics around the world