Featured Product from General Plastics Manufacturing Co.

More Info Email Supplier Request A Quote

FR-6700 Aerospace Grade is a CFC-free, rigid, closed-cell, flame-retardant polyurethane foam available in densities ranging from 10 to 25 pounds per cubic foot. It exhibits a high strength-to-weight ratio because of its cellular structure and cross-linked resin. Its closed-cell structure also makes this rigid polyurethane foam series highly resistant to water absorption, so it will not swell, crack or split on exposure to water. The HDU material is stable, inert and resistant to most chemicals and solvents. These characteristics make it an excellent replacement for wood. This series is non-abrasive and can be machined with standard high-speed steel (HSS) cutting tools. It can also be cut cleanly with water jets and traditional wood-carving tools. To save production time, General Plastics can pre-score FR-6700 boards for liquid resin infusion processes.

FR-6700 is specifically designed to satisfy the physical property, flammability performance and processing requirements of multiple aerospace and military specifications. These include Boeing BMS 8-133, McDonnell-Douglas DMS-1937, and Federal Aviation Regulation FAR 25.853 (a). We can supply a certificate of conformance and test data upon request.

For greater flame-retardant properties, please inquire about our FR-6706 product.

For lower-density foams with comparable physical property characteristics, flammability, temperature resistance and chemical resistance performance see LAST-A-FOAM® FR-3700 Performance Core Series

From Air Force One to Missile Systems, We Shape Ideas into Flyaway Aerospace and Defense Solutions
Download our Aerospace Brochure.
General Plastics supplies aerospace and defense manufacturers with built-to-print flexible polyurethane products and aerospace-grade rigid foam core materials for aircraft flight decks and interior cabins. These customized, flame-retardant polyurethane products include our integral-skin foams (or “self-skinning” foams). Our materials are used in flight deck pads, passenger cabin walls and ceilings, overhead stow bins, service-class dividers, galleys and lavatories, and as edge closeout. Our customers also tap our extensive experience with polycarbonate and acrylic sheets for aircraft passenger windowpanes and wingtip-lens transparencies.

We cost-efficiently machine and fabricate rigid foam board and flexible foam materials to demanding aerospace and military defense specifications.

General Plastics offers extensive, scalable CNC-machining capabilities, and accepts customer-supplied CAD data. We have the skills, capacity and facilities to precisely manufacture build-to-print parts that satisfy the most complex requirements. All of our products are manufactured in the United States of VOC- and CFC-free foams. Our company is ITAR-compliant.

Read this case application to learn how our high-temperature Tooling Boards are helping create new products to the helicopter market.

Click here to request a sample kit.

A stellar track record from underground silos to outer space

Superior-quality General Plastics materials have been proven in military and missile defense applications for more than 50 years. Our flexible, polyurethane open-cell foams are formulated to absorb large amounts of impact energy at controlled rates while cushioning payloads from high G-stress levels. They have been used extensively as “spring-damper” shock isolation systems, protecting missiles in underground silos and submarine launch tubes. The Minuteman, Peacekeeper and Trident programs have all relied on LAST-A-FOAM® products.

We have proudly supported NASA’s extraterrestrial missions since the dawn of the space age. Today, we are actively collaborating with commercial space companies as they extend the frontiers of space travel and exploration. Working with our longtime aerospace and defense partners, and with others blazing new trails, General Plastics is making great ideas the shape of things to come.


  • Fabrication
  • Pattern making
  • Tooling
  • CNC machining
  • Assembly
  • Painting
  • Adhesive bonding
  • Pre-preg and potting processes
  • Resin-infusion processes



  • Flight Deck Pads
  • Cabin Walls and Ceilings
  • Service-Class Dividers
  • Overhead Stow Bins
  • Galleys and Lavatories
  • Aircraft Radome
  • Composite Cores
  • Tooling Board
  • Aircraft Prototypes
  • Wingtip-Lens Transparencies
  • Honeycomb Edge Closeout
  • Vacuum-Form Dies/Mold Patterns



  • NQA-1, MIL-I-45208A
  • Boeing Company D6-82479
  • BMS 8-133 Core Materials
  • BMS 8-350
  • BMS 8-39
  • ISO 9001:2015/AS9100D
  • ITAR compliant


Recommended Products:



75years-of-passion-and-innovationFor over 75 years, we have focused on meeting the exacting requirements of engineers and design teams in diverse industries. Our premier LAST-A-FOAM® closed- and open-cell polyurethane foam products provide a high strength-to-weight ratio and extraordinary versatility, with absolute consistency from order to order, guaranteed.

Whether you need high-temperature tooling boardsmolded parts or submersible foams, expect identical quality, uniformity, stability and weight for the density you specify – every time.

From the oceans’ depths to deep space, we shape great ideas into reality.