Leaching problems must be resolved for borate treatment to substitute for cca pressure treated wood. Both the treatment process and the use of treated products can result in exposure to pesticides for both people and the environment.
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The primary resulting products are charcoal and pine tar.
Tar wood preservative. If you desire to apply a paint stain clear water repellent or other finish to your preservative treated wood we recommend following the manufacturers instructions and label of the finishing products. Koppers coal tar distillates in the form of creosote are a cost efficient and integral part of north americas transportation industry. Pine tar is a sticky material produced by the high temperature carbonization of pine wood in anoxic conditions dry distillation or destructive distillationthe wood is rapidly decomposed by applying heat and pressure in a closed container.
Use of preservative treated wood requires certain precautions by maciek rupar electing appropriate fasteners when using preservative treated wood is compli. Apart from structural wood preservation measures there are a number of different preservatives and processes also known as timber treatment lumber treatment or pressure treatment that can extend the life of wood timber wood structures or engineered woodthese generally increase the durability and resistance from being destroyed by insects or fungus. Borate treatment is not technologically mature in comparison with cca treated wood.
Creosote definition an oily liquid having a burning taste and a penetrating odor obtained by the distillation of coal and wood tar used mainly as a preservative for wood and as an antiseptic. Manufacturer and suppliers of coal tar products including coal tar pitch tar pitch coal tar coating coal tar pitch coal pitch coal tar creosote anthracene anticorrosive coal tar coating binder pitch blended pitch creosote oil crude naphthalene dehydrated coal tar pitch powder and wood preservative. Creosote and the biocidal products directive.
The use of creosote as a wood preservative has been reviewed under the biocidal products directive and the following inclusion decision has been taken from 01 may 2013 wood preservatives containing creosote will need to be authorised for use in the eu. Wood preservative products are those that claim to control wood degradation problems due to fungal rot or decay sapstain molds or wood destroying insects. Railroad crossties that are pressure treated with creosote have a service life of 35 to 40 years making it an economical and reliable product for the railroad industry.
Pine tar consists primarily of aromatic hydrocarbons tar acids and tar bases.
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