Posted in | Adhesives

Using Polyurethane Foam in Doors and Windows

Leverage the unique chemistry of LAST-A-FOAM® by General Plastics for both door and window applications. The rigid polyurethane foam has been tested and confirmed to be effective, offering customers a material that is long-lasting, sturdy, and meets the requirements for professional craftsmanship.

All LAST-A-FOAM® polyurethane foam is designed to be dimensionally stable and not warp or bow. The foams have great resistance to water absorption due to their closed cell structure and will not swell or break when exposed to moisture. It has also been demonstrated that its physical qualities can be retained in long-term applications.

LAST-A-FOAM® polyurethane foam, which is resistant to rot, fire, and water, is a great alternative to wood as the main component of the entry, interior, and garage doors.

As a result of its robustness, reduced weight, and superior insulating characteristics, it is also an option for medium-density fiberboard (MDF). For example, the microcellular foam with the finest cell surface, LAST-A-FOAM® FR-4600, can accommodate window trim applications with delicate and 3-dimensional detailing.

LAST-A-FOAM® adheres effectively to composite skins and can also be utilized without adhesive when bonding, such as curing pre-impregnated skin with a lower-density foam or molding a cured composite skin to the foam material.

General Plastics provides many products in a variety of densities (3 to 50 pounds per cubic foot), allowing users to select the mechanical attributes that are right for their application, whether its strength, machinability, fire-retardant properties, grain detail, or surface finish.

LAST-A-FOAM® is available in sheets, blocks, and molded forms. Molding allows for outstanding grain detail that mimics the look of wood.


  • Lightweight, robust, and durable
  • Sticks well to composite skins, wood, and engineered wood products
  • Different products for numerous density and strength requirements
  • Grain-free, fine-cell surface for intricate details, painted finishes, better machining, and processing
  • Compared to other materials, it provides significant weight savings
  • Compatible with different types of adhesives
  • Does not absorb water and does not warp
  • Accommodates virtually any resin and coating system


  • Window trims
  • Insulated entry doors
  • Insulated garage doors
  • Decorative features for doors and windows
  • Interior doors

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