Order by 24/7 by web, contact our sales reps or call by phone.
What you need, when you need it, all in one place.
Most orders ship same day.
Advice and support from knowledgeable professionals.
PolyBak PB42 veneer backer is a low cost balancing backer and paintable overlay that supports stable panel construction on projects using decorative laminates or wood veneers. The nominal .011 inch thickness provides a thin, predictable layer that balances the face material without adding unnecessary build, which helps maintain overall panel dimensions on cabinets, fixtures, or built-ins. The brown color gives a consistent appearance on concealed or semi-exposed back sides, which can be useful where an even tone matters on interior surfaces. PB42 is described as having properties similar to lower cost Poly br Bak PGB, but with greater tensile strength and moisture resistance, so it stands up better when panels experience handling, moderate humidity shifts, or jobsite conditions. The backer is rated at a basic performance level, which fits everyday balancing and overlay needs where cost control, predictable behavior, and straightforward processing are priorities.
This PolyBak PB42 backer has a nominal thickness of .011 inch, giving fabricators a thin balance layer that behaves consistently in presses and during trimming. At 31 inches by 145 inches, each sheet covers substantial panel area, which supports efficient layout on casework sides, doors, or partitions. The brown color works as a neutral back face behind decorative laminates or wood veneers, helping shops deliver a finished appearance even on surfaces not fully exposed. Because PB42 offers greater tensile strength and moisture resistance than lower cost Poly br Bak PGB, it maintains its integrity through typical shop humidity swings and handling steps, supporting fewer damaged panels between layup and installation.
PB42 is commonly used for balancing substrates faced with wood veneer, giving the back side of veneered panels a counter layer that helps control movement once the face veneer is applied. The same sheet also balances substrates faced with decorative laminates, so laminate casework, countertops, or partitions gain a more stable structure that responds evenly to environmental changes. PB42 is listed as a paintable overlay, so it can serve as a prepared surface where a painted finish is desired instead of a raw substrate face, helping achieve a more uniform coated appearance. The sheet can also be used over MDO for concrete forms and other applications, extending its role beyond traditional furniture or cabinet work into construction-related panels where a backer or overlay layer is needed.
PB42 is described as having greater tensile strength and moisture resistance than lower cost Poly br Bak PGB, which matters when panels move through multiple handling, machining, and transport steps before final use. That extra strength helps the backer resist tearing or stretching, so the bond line remains stable and the panel stays flatter over time. Extreme flexibility lets PB42 adapt to substrate irregularities and modest curves, supporting better adhesion and reducing the risk of surface fractures during pressing or forming operations. Unlimited shelf life allows shops to store PB42 without aging concerns, which supports buying for multiple projects and pulling from stock as schedules shift. The Class A Flame Spread Rating adds fire-performance value to the panel assembly design, which can be important in commercial interiors where material ratings are part of the specification. Green Guard Gold certification and NAF (No Added Formaldehyde) status support projects focused on low-emission interiors, allowing PB42 to contribute to healthier indoor environments as part of the overall construction material package.
The PB42 backer sheet measures 31 inches by 145 inches, so it covers large panel areas and supports efficient cutting layouts for cabinet sides, doors, or partitions.
The PB42 backer has a nominal thickness of .011 inch, providing a thin yet functional balancing layer that works well in pressed panel constructions without adding significant build.
PB42 is commonly used to balance substrates faced with wood veneer or decorative laminates and as a paintable overlay, supporting stable and finished back faces on fabricated panels.
PB42 is described as stronger than comparable thickness saturated Kraft paper backer, offering better tear resistance during handling and machining for more dependable panel processing.
The Class A Flame Spread Rating indicates PB42 contributes higher fire-performance characteristics to the panel assembly, supporting use in projects where this rating is part of the design.
PB42 is Green Guard Gold certified and NAF (No Added Formaldehyde), which supports low-emission interior projects and helps align panel construction with formaldehyde-conscious specifications.
Choosing PolyBak PB42 veneer backer provides a low cost balancing backer and paintable overlay that supports flat, stable panels faced with decorative laminates or wood veneers. The .011 inch nominal thickness, 31 inch by 145 inch size, and brown color give shops a predictable, work-ready sheet for everyday casework and panel fabrication. With greater tensile strength and moisture resistance than lower cost Poly br Bak PGB, extreme flexibility, and a Class A Flame Spread Rating, PB42 helps panels perform consistently from layup through installation. Its Green Guard Gold and NAF (No Added Formaldehyde) status aligns with indoor air quality goals, allowing this Richwood Industries backer to serve both performance and project specification requirements on professional woodworking jobs.
Sold In: 1 Sheet