Work on wood modified with acetic acid began in 1928, unfortunately the high cost of the process lead to extremely limited commercial production. However, work by scientists continued around the world. Their incentive was largely due to the potential offered by acetylated wood's unmatched performance properties and sustainability credentials. A cost-effective production has been made possible due to recent advances in a patented, closed loop, chemical engineering technology used in the production process. This modified wood is now commercially available, as Accoya.

Research results from extensive testing proves that Accoya® is 100% non-toxic.

"We consider that a window prepared from a permeable timber species that is acetylated through the cross section to 20% WPG, will show significantly improved coatings performance properties. If the window is designed and built to the principles of best practice, installed by competent contractors and linked to the Sikkens Sentinel Plus coated wood care and maintenance package it will provide a window of outstanding durability and dimensional stability that would meet a 60 year service life requirement" by Dr Ed Suttie, Director, Timber Division of BRE.