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Strongwell - The World's Largest Pultruder and the USA's Largest Polymer Concrete Precaster!

DURASHIELD® Foam Core Building Panels


DURASHIELD® Foam Core Building Panels

DURASHIELD® is an excellent construction material for use in cold locations.

The foam core panels are often used in the construction of small equipment enclosures that require extreme strength and thermal insulation.



interlocking panels


DURASHIELD® is a tongue-and-groove fiberglass pultruded panel comprised of a pultruded skin over a foam core.


Features of DURASHIELD®
  • Integral Insulation
  • Lightweight
  • Corrosion Resistant
  • Low Electrical & Thermal Conductivity
  • Strong
  • Flame Retardant
  • Transparent to Electromagnetic Emissions


pultrusion of the panel

Materials of Construction

The pultruded fiberglass skin is available in either an isophthalic polyester or vinyl ester resin. Both resin systems are flame retardant (UL94 VO). Vinyl ester is utilized in more corrosive applications. A synthetic surfacing veil is incorporated into the skin to improve weathering, corrosion resistance and resistance to degradation from ultraviolet rays. Resistance to weathering can be further enhanced by the application of a polyurethane paint. The core material is rigid closed-cell urethane foam. The foam core provides an insulation "R" factor of 7 for the 1" panel and 21 for the 3" panel.



DURASHIELD® panels are available in 1" x 12" and 3" x 24" sizes. The panels can be produced in any length that is practical. Typical lengths would be in the 12' to 32' range.

compaq building  

DURASHIELD® Applications


DURASHIELD® panels are designed to be used as walls, roofs and covers. Typical applications include:

  • Radar, Microwave, Radio and TV Antenna Enclosures
  • Enclosures for Electrical Equipment
  • Enclosures of Chemical Processing Operations
  • Buildings for EMI Testing (Computer Testing)
  • Chemical Pit Covers
  • Roofs on Wet-End Pulp and Paper Manufacturing
  • Modular Buildings
DURASHIELD HC™ Hollow Core Building Panels

DURASHIELD HC™ is a cost-effective alternative to DURASHIELD® because the building panel has a hollow-core. The panel is a sensible choice for any type of roofing, flooring, enclosures or screening that does not require insulation. It is a custom designed tongue-and-groove building panel for quick assembly and easy installation in various applications.

The pultruded panel’s unique hollow core and intermediate ribs provide extra stiffness for uses such as decking, cladding or tank covers. The panels can be bonded together with standard adhesives and attached to structural shapes with bolts or screw fasteners. These standard polyester panels will not rot, rust or mildew, which makes them ideal for high moisture environments including saltwater.

Durashield HC
Connecting Panels

Materials of Construction

A synthetic veil is incorporated into the surface to improve weathering, corrosion and UV resistance. The standard resin system of DURASHIELD HC™ is polyester; however, it can be custom ordered with a vinyl ester resin for highly corrosive applications. Both resin systems include flame retardants and meet the requirements of a Class 1 flame spread per ASTM E84 and the self-extinguishing requirements of ASTM D-635. The panel weighs 3.27lbs/linear ft.



DURASHIELD HC™ is available in standard 1" x 12" panels. The panels can be produced in any length that is practical.


Features of DURASHIELD HC™

  • LightweightSee Through HC
  • Easy to Install
  • Rot, Rust and Mildew Resistant
  • Low in Conductivity
  • Strong
  • Flame Retardant
  • Low in Maintenance


compaq building DURASHIELD HC™ Applications


DURASHIELD HC™ panels are designed to be used as walls, roofs and covers. Typical applications are:

  • Cladding
  • Decking
  • Cellular Enclosures and Screening
  • Tank Covers
  • Cooling Tower Partition Walls
  • Buildings and Enclosures when Insulation is Not Required

DURASHIELD® and DURASHIELD HC™ panels are made for use with Strongwell's EXTREN® line of structural shapes. EXTREN® is available in more than 100 standard shapes. Supporting fiberglass structural shapes are available for section/base, corner connections, roof joiners, door framing and window louvers. Typical additional supporting shapes are shown below.


Use 1" Panel Supporting Shapes-Shape Description 3" DURASHIELD® Panel Supporting Shapes-Shape Description
Section/Base 5-1/2" x 1-1/2" x 1/4" F Section Standard EXTREN® Angle
Corner Post 3-1/2" x 1/4" Custom Corner Post Standard EXTREN® Angles Inside & Outside
Door Framing 1-1/2" x 1-1/2" x 1/4" EXTREN® Channel 3-1/2" x 2" x 1/4" EXTREN® Channel
Window Louvers 1-1/2" x 1-1/2" x 1/4" EXTREN® Channel 3-1/2" x 2" x 1/4" EXTREN® Channel
Fasteners 3/8" dia. FIBREBOLT® Stainless Steel (optional) 1/2" dia. FIBREBOLT® Stainless Steel (optional)






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