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What is Wolmanit CX?
Wolmanit CX is a range of liquid wood
preservatives based on copper and organic
biocides. They have been used for more than
twenty years across continental Europe and the
UK. Wolmanit CX products are based on
copper-hydroxide carbonate and Wolman’s patented
active ingredient copper-HDO. The products have
proven efficacy in the use classes 1-4 and have
proven track record in various climatic
conditions. They are applied using a vacuum and
high pressure impregnation process.
What length of service life can be
expected?
Those timbers exposed to weathering
but installed above ground contact will achieve
service lives of between 15-30 years. Timbers
serving in-ground contact such as fence posts
can achieve a service life of around 20 years.
What is the appearance of
Wolmanit CX treated timber?
Wolmanit CX treated timber has a green
background colouration. This is mainly as a
result of the copper compounds in the wood. The colour is a result of permanent
chemical reactions in the wood fibres. The
colour will typically last for six months to one
year after treatment. The intensity of the
colour depends upon a number of factors
including the initial application rates and the
finish of the timber.
Over time the timber will fade to a
brownish colour and eventually will become
silver, like all other weathered timber
products. This does not effect the performance
of the preservative. Wolmanit CX treated timber
is also available with a brown colour. As with
the natural green colouration of the treated
timber, the brown colour will fade after a
period of time. The rate of fading will depend
on the end us application and environmental
conditions. Colouration of timber can be
maintained using Wolwax Refresh. This product
imparts both fresh colouration and water
resistance to timber used outdoors such as for
decking and cladding applications.
Can I paint and stain this
timber?
Yes Wolmanit CX treated timber can be
painted using most standard wood coating
systems. It is important that the timber should
be dried sufficiently following treatment. In
general that means that the timber should be
less than 20% moisture content, at the time of
painting. Both water-based and oil-based systems
are compatible but advice should be sought from
the coatings supplier before application.
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