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.
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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

New Regional Manager for SPI

New Regional Manager for SPI

30-year composites expert, Todd McKechnie, has been appointed as SPI's Northeast Regional Business Manager  Read More

Bonded-Buildup Just Got Easier with KYDEX® 4545

Bonded-Buildup Just Got Easier with KYDEX® 4545

SPI announced today the release of the ULTRA-low heat release product KYDEX® 4545 — a new addition which makes SEKISUI SPI the first and only thermoplastic sheet manufacturer with a complete aviation interiors product line, from flight deck to economy class.  Read More