The Benefits of Buying Certified

Not all 'commodity' products are created equal. Today, as the industry becomes more savvy about testing the strength and quality of wood products, items that were once considered standard stock are now differentiating themselves into quality tiers that can have significant impact on projects.

In the U.S., meeting product and performance standards set by organizations such as the Office of Standards Services of the National Institute of Standards and Technology (NIST) or the APA is voluntary. On a national level, most U.S. manufacturers cooperate and meet these products guidelines as a matter of course, however imported or off-grade products may not, causing quality to suffer.

For example, a test conducted by the APA in 2006-2007 analyzed Asian overlaid plywood intended for the concrete forming industry to see if they met industry performance standards. Tested for mechanical properties, bond performance and formaldehyde emissions, the results were astonishing.

Using wood failure as an indicator, the average glue bond performance of the non-trademarked Asian plywood was 57%. The performance standard of PS 1, Construction and Industrial Plywood requires a minimum of 85%. The higher the percentage of wood failure, the better the glue bond performance.

Additionally, the report also stated "the results of bending tests indicated that the non-trademarked Asian plywood had an average load capacity 40% below the level of APA Class I PS 1 plywood." Further, the Asian plywood had formaldehyde emissions ranging from 0.02 to 9.97, whereas PS 1 plywood emissions stand at 0.02-0.03.

As you can see from the results, there is a wide range of variability of non-certified, imported products sold for concrete forming. Without a credible certification mark showing conformity to a standard, the end-user has no assurance of good panel performance.

APA trademarks appear only on products manufactured by APA member mills. The mark signifies that panel quality is subject to verification through APA audit- a procedure designed to assure manufacture in conformance with APA performance standards or the standard shown in the mark. For panels with the greatest bond durability, strength and stiffness, look for the APA trademark stamped on the panel back or edge. The best time to check grading stamps is when the bundles are cut. Grading agencies in the U.S. have clearly defined stamps. The typical APA stamp will have the following information:

  • Certification agency trademark
  • Panel grade (STURD-I-FLOOR, RATED SHEATHING, RATED SIDING or plywood grade (A-C, C-D)

Rosboro MDO technical information.


Quality and Convenience

Rosboro MDO PlywoodAvailable in a variety of lengths, lay-ups and thicknesses, Rosboro's family of MDO products are APA/EWS certified and conform to PS1-07. For added convenience, we can bundle your plywood products with other Rosboro building materials, such as studs and Glulam.

Rosboro MDO Concrete Form is manufactured with a Struc I, BCX, Class I plywood substrate with several overlay options available to suit a particular end use. Balanced Douglas fir construction makes the panel strong and very stable.

Rosboro 454-C Panel

Concrete Form Product Offerings

Rosboro High Mask

Paneltech 454C - high masking properties with a mottled surface that yields a concrete finish with moderate wood grain transfer. 35% resin content is formulated to resist the action of alkaline concrete fluids and ensure a long form life.


Rosboro 407-C Panel

Rosboro High Resin

Paneltech 417C - 38% resin content resulting in a hard abrasion-resistant surface. The high-resin, alkaline-resistant MDO gives the panel more pours than standard MDO concrete form. Featuring a translucent olive-green face, the panel yields a smooth matte concrete finish with heavy wood grain transfer. Not recommended for engineered systems.


Rosboro Standard Form

Rosboro 389-C Panel

Paneltech 389C - our most economical panel that holds up to multiple uses depending on application, service conditions, form maintenance, and handling. A durable alternative to BB concrete form with MDO-type performance. The brown Kraft face yields quality matte concrete finish with moderate to heavy wood grain transfer.

Factory Sealed

  • Nox-Crete Form Coating is factory applied to the panel face so the form separates easily from concrete.
  • Panels are edge sealed to prevent moisture penetration of highly alkaline concrete bleed water into the edges of the plywood forms.
  • Form Stripping

Metal bars or pry bars should not be used on plywood because they will damage the panel surface and edge. Use wood wedges, tapping gradually when necessary.

Form Maintenance

Concrete form performance depends on proper use and care of the panels. Soon after removal, forms should be inspected for wear, cleaned, repaired, spot primed, refinished, and lightly treated with a form-release agent before reusing. Cut or exposed edges should be resealed to prevent moisture absorption and panel swelling.

Do not use form-release agents that contain diesel fuel, mineral spirits, or motor oil as these may soften and eventually degrade both the overlay and the panel itself.

Handling and Storage

Care should be exercised to prevent panel chipping, denting, and corner damage during handling. Avoid dropping the forms and carefully pile them flat, face-to-face and back- to-back. Forms should be cleaned immediately after stripping. During storage, the panels should be kept out of the sun and rain and covered loosely to allow air circulation without heat build-up.

Sizes Available

  • 4' x 8' and 4' x 10'
  • 2' x 8' and 2' x 10'

Thickness Available

  • 3/8" to 1-1/8"


  • Structural I - Manufactured with Group I species throughout. It will support the highest loads both along and across the panel. This panel is recommended when face grain is parallel to supports.
  • Class I - Requires group I faces for high strength and stiffness
  • Class II - Can utilize Group II species but still provides adequate strength for most forming applications.

Rosboro Hi-Flow PanelPieces per Unit

Thickness Unit Size
3/8" 88
1/2" 66
5/8" 55
11/16" 48
23/32" 44
3/4" 44
7/8" 38
1" 33
1-1/8" 30

Low Formaldehyde Emissions

The glue used to manufacture Rosboro's APA trademarked engineered wood panels is safe for both builders and consumers. Performance panels manufactured in accordance with U.S. Voluntary Product Standards PS 1 and PS 2 use phenol formaldehyde, a waterproof  adhesives that is highly durable and stable, and results in low formaldehyde emissions. APA Rated panels use only moisture resistant adhesives that are exempt from U.S. HUD and California formaldehyde regulations due to their very low emission rates.

Click here for more information on Low Formaldehyde Emissions


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  • CE (Europe)


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