Norbord's SterlingOSB Zero is a precision-engineered OSB3 board which now contains zero added formaldehyde. It is unique in the market by being the only manufactured ZAF OSB in the UK.

Norbord has recently invested £95m in a new plant in Inverness, Scotland. The new family of products is a development of the most popular OSB brand in the building and interior design arena and comprises SterlingOSB Zero 3, SterlingOSB Zero Tongue and Groove, SterlingOSB Zero SiteCoat, SterlingOSB Zero Fire Solutions and SterlingOSB Zero StrongFix.

It is designed for structural use in load-bearing and challenging conditions as well as being hugely popular in the aesthetics-led interior design industry.

Unlike traditional oriented strand board (OSB) containing urea-formaldehyde (UF) or melamine-urea-formaldehyde (MUF) binders, the new SterlingOSB Zero family from Norbord uses a methylene diphenyl diisocyanate (poly-urethane MDI) resin to bind the thousands of strands that make up each board.

As well as being healthier, a ZAF board offers superior performance compared to conventional low-e72mission boards made with UF or MUF. The MDI binder has better mechanical properties including a stronger internal bond and a lower modulus of rupture than UF/MUF boards. A ZAF board is more moisture resistant (subject to less swelling in humid environments such as kitchens and bathrooms) and is stiffer and less prone to ‘creep’. The pMDI resin in a ZAF board is suitable for hot and humid climates, unlike boards containing UF or MUF resins. Boards made with pMDI binders also contain less resin – and hence more wood – than traditional boards, meaning they are ‘greener’.

SterlingOSB Zero is even more environmentally-friendly to produce. The pMDI binder cures at a lower temperature than UF/MUF resins so less heat energy is consumed during manufacture. It is also safer to produce since pMDI resin uses water as a catalyst in the curing process; UF/MUF resins need the addition of ammonium nitrate – an explosive chemical – to harden.

Like all Norbord OSB products, SterlingOSB Zero is made from forest thinnings taken from sustainably managed forests. All of Norbord’s production sites in Europe are able to produce wood-based materials that are certified according to the guidelines of the FSC or PEFC.


Norbord's SterlingOSB Zero is a precision-engineered OSB3 board which now contains zero added formaldehyde. It is unique in the market by being the only manufactured ZAF OSB in the UK.

Norbord has recently invested £95m in a new plant in Inverness, Scotland. The new family of products is a development of the most popular OSB brand in the building and interior design arena and comprises SterlingOSB Zero 3, SterlingOSB Zero Tongue and Groove, SterlingOSB Zero SiteCoat, SterlingOSB Zero Fire Solutions and SterlingOSB Zero StrongFix.

It is designed for structural use in load-bearing and challenging conditions as well as being hugely popular in the aesthetics-led interior design industry.

Unlike traditional oriented strand board (OSB) containing urea-formaldehyde (UF) or melamine-urea-formaldehyde (MUF) binders, the new SterlingOSB Zero family from Norbord uses a methylene diphenyl diisocyanate (poly-urethane MDI) resin to bind the thousands of strands that make up each board.

As well as being healthier, a ZAF board offers superior performance compared to conventional low-e72mission boards made with UF or MUF. The MDI binder has better mechanical properties including a stronger internal bond and a lower modulus of rupture than UF/MUF boards. A ZAF board is more moisture resistant (subject to less swelling in humid environments such as kitchens and bathrooms) and is stiffer and less prone to ‘creep’. The pMDI resin in a ZAF board is suitable for hot and humid climates, unlike boards containing UF or MUF resins. Boards made with pMDI binders also contain less resin – and hence more wood – than traditional boards, meaning they are ‘greener’.

SterlingOSB Zero is even more environmentally-friendly to produce. The pMDI binder cures at a lower temperature than UF/MUF resins so less heat energy is consumed during manufacture. It is also safer to produce since pMDI resin uses water as a catalyst in the curing process; UF/MUF resins need the addition of ammonium nitrate – an explosive chemical – to harden.

Like all Norbord OSB products, SterlingOSB Zero is made from forest thinnings taken from sustainably managed forests. All of Norbord’s production sites in Europe are able to produce wood-based materials that are certified according to the guidelines of the FSC or PEFC.


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Norbord's new zero added formaldehyde (ZAF) OSB range