Your Needs – Our Drive.
SEKISUI SPI is setting a new standard of excellence in thermoplastics.
Designed With You In Mind
Innovation and collaboration is important for your success, so it’s our top priority.
New Name. New Products. Same Excellence.
SEKISUI SPI is better equipped to help you grow today, tomorrow, and well into the future.
Sekisui SPI.  Bring Imagination To Life In Our Labs. designLab FSTLab
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Designers Engineers Fabricators

Welcome To SEKISUI SPI

The New Name For Excellence In Thermoplastics.

SEKISUI SPI represents an ability to think, design and create in a highly complex and demanding industry. By bringing innovators in thermoplastics – KYDEX, LLC and ALLEN EXTRUDERS – together we are able to understand the needs of our customers better and are positioned to deliver to them the best solution for their specific needs.  Learn More

Better Solutions for All

Spotlight Video
Introducing SEKISUI SPI: By bringing KYDEX, LLC and ALLEN EXTRUDERS together as part of SEKISUI SPI, we are setting a new standard of excellence for the plastics industry to think, design and create.

Recent News

Science for Silence: The Quest for a Quiet Cabin

Science for Silence: The Quest for a Quiet Cabin

Defeating ambient noise is a complicated problem.  Read More

The KYDEX® and ALLEN® Thermoplastics websites have combined into one.

The KYDEX® and ALLEN® Thermoplastics websites have combined into one.

All the product data and marketing information you need is here. If we can’t help you find what you’re looking for, please contact us.  Read More