VACSOL water based preservatives are industrially applied in a controlled low pressure, double vacuum process which give an outer envelope of protection to general construction and joinery timbers. Less moisture is absorbed than in high pressure treatments allowing the wood to dry quicker and helping to retain its original dimensions.
The appearance and colour of VACSOL treated timber remains unchanged although a colour indicator can be added if required to aid treatment identification.
VACSOL treated timbers should only be used above the damp proof course of any building. When used in exterior applications, they must have an appropriate and well maintained surface coating.
Technical details for VACSOL preservative and VACSOL treated timber are available in our Knowledge Centre.