Recycled Plastic Industries
Recycled Plastics Industries

Product Data

RPI Plastic Lumber comes in standard and limited production profiles. Click below to view profile information

standard profiles limited production profiles


RPI plastic lumber is produced from high-density polyethylene (HDPE), colorants (pigments) and UV inhibitors.

RPI Plastic Lumber is:

  • Manufactured to exacting specifications and is resistant to corrosive substances, oil and fuels, insects, fungi, salt spray, and other environmental stresses.

  • RPI Plastic Lumber does not absorb moisture and will not rot or splinter.


To maintain the original finish, clean the lumber with soap and water. No sealing or painting is required; as a general rule, paint will not adhere to RPI lumber products.


It is not recommended for use as a structural member. It is also recommended that an engineering study be performed prior to the use of RPI plastic lumber if the application involves any structural requirements.

When utilizing RPI plastic lumber for decking or flooring, careful attention must be paid to joist spacing. Supports should be placed 12 inches on center for 1x profiles. Profiles greater than 1x may be utilized at 16 inches on center. For heavy load bearing applications additional support may be considered.

Basic Uses

RPI plastic lumber can be used as replacements for wood lumber applications. For exterior applications where weathering resistance and low maintenance are required, RPI lumber should be your choice.

Used in both residential and commercial applications, RPI plastic lumber will exceed the performance of conventional lumber in the worst environmental conditions.

Mechanical Properties @ 70° F
Test Method
Average Value
ASTM D6111
.0237-.0249 lbs/cu in
Modules of elasticity (@ 1% strain)
ASTM D6109
111,700-113,950 psi
Ultimate flexural stress (@ 3% strain)
ASTM D6109
2,250-2,325 psi
Allowable flexural stress
ASTM D6109
1200 psi
Endwise compression stress (@ 3% strain)
ASTM D6108
3,300-3,650 psi
Screw withdrawal, #10, 1 1/2"
ASTM D61177
325 lbs
Water absorption, 11 weeks
.01% 24 hrs
Coefficient of thermal expansion
ASTM D6341
.00007 in/in/ °F


The materials utilized in recycling plastic lumber are flammable but not combustible, HDPE is difficult to ignite and the flame will normally self extinguish.

Accepted extinguishing method: DRY CHEMICAL, CO2, WATER FOG/SPRAY, and FOAM. Emissions from combustion are carbon dioxide, carbon monoxide, H2O, nitrogen and organic vapors.

      • Flash Point; 330° C (700° F) (ASTM E138)
      • BTU's/lb: 19,900
      • Melt Temperature: 104° - 108° C (220° - 230 ° F)

NOTICE TO READER: All the information contained in this document is presented in good faith. This information if believed to be reliable at the time of preparation of this document.


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3110 Market Street, Green Bay, WI 54304
Phone: 920-330-9050 | Fax: 920-330-9055