Georgia-Pacific 100% NAF Resin MDF Boards
Georgia-Pacific Ultra Stock MDF Boards
Georgia Pacific UltraStock MDF board

UltraStock® MR MDF

  • Meets thickness swell and bond integrity criteria required for MR 50 designation
  • Manufactured with 100% NAF resin
  • Provides same physical characteristics and workability as UltraStock® Premium panels
Test-proven panels meet swell performance.

UltraStock® MDF products provide optimized panel solutions for a wide selection of performance characteristics and delivers test-proven thickness-swell resistance. Engineered to resist elevated moisture and humidity, UltraStock® MR meets the thickness swell and bond integrity criteria required for the MR 50 designation.  It’s more proof that nobody treats you better than Georgia-Pacific.

Provides the same physical characteristics and workability as our premium panels.

Manufactured with 100% NAF resin.

Meets reduced thickness swell criteria of 5.5% or less.

Test samples meet bond integrity criteria of 50% of original MOR after accelerated aging.

Sink bases, dishwasher enclosures, wet-area residential applications

May be used on interior window and door trim, baseboards and laminate flooring that may become wet from mopping, condensation or even foot traffic.

Laboratories, locker rooms, laundry areas, cafeterias of schools, industrial facilities and other public buildings where wetness or high humidity are a factor.

All UltraStock MDF panels are recognized by the California Air Resources Board (CARB) as no added formaldehyde (NAF) products by Executive Order N-15-021a.

SPECS

Dimensions
Thicknesses

1/4” –  1-1/2”

Widths

To 5’

Lengths

To 16’

Physical Properties
Min Panel Averages (1)
1/4” to <1/2”          1/2” to 3/4”              >3/4”
MOR-Modulus of Rupture (psi)
4050                          4050                          4050
MOE-Modulus of Elasticity (kpsi)
405                            405                             405
IB-Internal Bond (psi)
130                            120                             110
Face Screw Holding Capacity (lbs)
250                            270                             270
Edge Screw Holding Capacity(lbs) (2)
NA                             250                             250
Formaldehyde Emissions - CARB II Compliant
✔                              ✔                               ✔
24-Hour Thickness Swell
<5.5%                       <5.5%                        <5.5%
  1. One-panel minimum average per ANSI 208.2
  2. Not applicable for thinner than 5/8”
Tolerances
Length & Width
± 1/16” per panel
Squareness
± 1/64” per ft. of length
Straightness
± 1/64” per ft. of length
Thickness (within panel)
± 0.005”
Thickness (panel to panel)
± 0.005”
Environmental Credits
Recycled Content (MR credit 4)
Awards 1 or 2 points for using products with recycled content that constitute at least 10% or 20%, based on cost, of the total value of project materials.
Regional Materials (MR credit 5)
Awards 1 or 2 points for using materials on a project that are extracted and manufactured within 500 miles that constitute at least 10% or 20%, based on cost, of the total value of project materials.
Environmental Quality (EQ credit 4.4)
Requires composite wood products used on project to demonstrate documented compliance with California Air Resources Board ATCM formaldehyde requirements for ultra-low-emitting formaldehyde (ULEE) resins or no-added-formaldehyde (NAF) resins.
Low-VOC Emitting Materials (G2.9)
Specifies architects to select low-VOC emitting materials
Pre-consumer Recycled Content (604.1(2))
Use recycled content products in major areas such as walls, floor, insulation and roofing.
FSC® Certification (606.2(3))
Wood or wood-based products available that are certified by Forest Stewardship Council™.
Other Certification (606.2(6))
Wood-based components certified in accordance to CPA ECC 4-11.
Low Formaldehyde/VOC Emissions (901.4(a))
In compliance with ANSI A208.1.
Low Formaldehyde/VOC Emissions (901.4(c))
In compliance with CPA ECC 4-11.
Low Formaldehyde/VOC Emissions (901.4(d))
Composite wood contains no urea formaldehyde.
CERTIFICATIONS
ECC CERTIFICATION

UltraStock MDF products produced in the Georgia-Pacific facility in Mt. Jewett, Pennsylvania, have been awarded the Composite Panel Association (CPA) Eco-Certified Composite (ECC) grademark which verifies compliance with the CPA 4-11 ECC Sustainability Standard, the California Air Resources Board (CARB) Airborne Toxic Control Measure (ATCM) 93120 and the EPA TSCA Title VI rule.

ECC Eco-Certified Sustainable Use of Wood Fiber
FSC® CERTIFICATION

UltraStock MDF that is certified to conform to the requirements of Forest Stewardship Council® standards for FSC Mix Chain of Custody and Controlled Wood manufacturing is available by special order.

FSC Certified Building Products
EPA TSCA, TITLE VI

All UltraStock MDF is CARB and EPA TSCA Title VI compliant. This product contains no added formaldehyde.

MR50 Designation

Based on ANSI A208.2-2016 section 3.6, the moisture-resistance test criteria necessary to obtain an MR50 board designation are:

  • Product samples must maintain the 24-hour thickness swell test value of 5.5% or less
  • Samples must maintain an advanced bond integrity value measured as 50% of the original MOR specification for that product grade after accelerated aging.
  • The accelerated aging process subjects board samples to six complete cycles that include:
    • Immersion in water at 120° ±3° F for 1 hour
    • Exposure to steam and water vapor at 200° ±5° F for 3 hours
    • Freezing at 10° ±5° F for 20 hours
    • Heating to 210° ±3° F in dry air for 3 hours
    • Exposure again to steam and water vapor at 200° ±5° F for 3 hours
    • Heating to 210° ±3° F in dry air for 18 hours

After the six cycles are completed, the specimens shall be conditioned at 68° ±6° F and a relative humidity of 65 ±2% for at least 48 hours before the MOR testing.

PRODUCT RESOURCES

Specifications
Safety Data Sheets