Treatment with tung oil - composition and properties of the product

Treatment with tung oil - composition and properties of the product Tung oil for wood - properties, composition, varieties and application

Man has been using tung oil for a long time, since the construction of ships from wood. In the modern production of furniture and various household items, oil is indispensable, and the product, after applying such a product, will acquire high quality.

Tung oil is an excellent wood coating agent that is obtained from the fruits (i.e. nuts) of the tung tree.

The seeds of such a plant contain a lot of oils (as much as 70%), and for hey reason, the yield of their raw materials is quite large.

The most common are tung trees in Asia (China or Japan), and they are often grown in Australia, Canada, Italy and Georgia. Roughly, more than 90,000 tons of oil are produced in the world in one year.

General information

What is tung oil

Trees of the tung species belong to the euphorbia family, and there are ways to grow from 20 up to 40 meters in height, they have white flowers, and they also smell very nice. The fruits strongly resemble figs with large seeds inside, as well as a thin shell, the size leaves about 7 cm.

The nuts of such a tree are very poisonous, and their juice will be able to cause poisoning.

Oil from this plant was previously used to:

  • Coating redwood furniture.
  • Protect wood products from mold and decay.
  • Sewing shoes.
  • Fabric impregnation.

  • Inducing vomiting in patients.
  • Impregnation of boards for ships.
  • Refill lamps.
  • To make ointments for abscesses and burns.
  • Make soap.

  • Refill lamps.

Synthetic analogues of such oil simply do not exist, and other oil extracts do not have such a suitable quality for wood processing. After pressing, the cake will be widely used for the production of natural fertilizers in the soil.

Composition of the product and characteristics

The finished oil will be a yellow thick liquid that has a specific aroma (which will seem unpleasant).

The main properties of the material will be:

  • Excellent solubility in organic solvents-substances.

  • Iodine value ranges from 154 to 176.
  • Saponification level from 188 to 198.
  • Degree of density - up to 0.946 g / cm 2 ..


  • The pour point is 0 degrees.

The composition of the product is represented by fatty polyunsaturated acids - stearic, linoleic, palmitic, and eleostearic, and there are also a small number of unsaponifiable compounds. Despite the presence of components that are beneficial to humans, tung oil is not a food product, and it is also used only in the industrial and domestic spheres.Compared to flax seed oil, tung oil can dry out sooner, and even if a thick table was applied.

The waterproof film, in comparison with linseed oil, turns out to be more durable, which means that the product can often be called a natural varnish.

Properties and application of the oil

Impregnation with technical type tung oil is often used to create paints, varnishes, as well as coating wooden surfaces. It is highly valued for the fact that it will dry out faster, and also increase the protective properties of wood and increase the degree of resistance to wear, and will not damage it when exposed to moisture and alcohols. Craftsmen also love these products for giving a beautiful appearance to the coating - even, deep, thin and not shiny. The impregnation will bite into the wood so strongly because it will become a part of it.

Let's consider the main areas of application:

  • Impregnation of dishes made of wood, as well as cutting boards, rolling pins.
  • Manufacturing of expensive wood furniture to protect it, as well as enhance the beautiful wood pattern.
  • Protection of baths, houses, gazebos, other wooden buildings from rot, fungus, mold, cold and heat changes.
  • Processing of antiques and art for their long-term preservation.
  • Impregnation of very high quality floor coverings - parquet and boards.

  • Machinery processing, including electrical devices (generators, transformers and wires), as well as spare parts for aircraft and automotive parts.
  • Impregnation of products that come into contact with salt or fresh water.
  • Making musical instruments.

With the help of such a suspension it is possible to impregnate the outer layer of wood by 0. 2-0.

4 cm with full vapor permeability. Teak oil for wood contains no harmful components, and therefore it will be suitable for treating children's furniture, toys, and also facades in saunas and baths.

Drying time

The exact time frames for each of the stages of the technological process will be indicated by the manufacturer for specific teak impregnations, and

therefore we suggest giving approximate intervals:

Another important factor.

Fire hazard

Tung oil in liquid form does not create explosive mixtures without airless spray and fire hazard. But rags soaked in oil, or vice versa, are very dangerous, and therefore they should be disposed of with all the required precautions.Usually, such measures are regulated by the fire safety rules of any enterprise where fire-hazardous means are used. When working with wood oil in a domestic environment, it is important to prepare in advance a technological container, which will be filled to some extent with water.

it is required in order to throw all oiled wipes into the water after use.


The number of required oil impregnation will be determined by the density of the wood and the technology of working with the oil composition. The most economical oil consumption will be rubbing in with cloth-based wipes, but it will take enough time to apply the composition using this method. For this reason, the packages will be labeled with oil consumption rates for brush application.

Working with such oil will usually imply its two-layer application, which is why manufacturers were able to give a couple of values:

  • For the first layer, the approximate consumption will be 0.

    1 kg / 1 m 2 .

  • For subsequent layers 0. 075 kg / 1 m 2 .

What types of oil are there?

Grades of tung oil

The most popular is the oil from Vorma Tung Oil, made in Italy, which is sold in packs of 0. 15, 0.

5, 1 and 5 liters. The cost for 1 liter of oil ranges from 1400 to 1800 rubles. Mixed with teak and linseed oil, with paints and alkalis, the product will cost much less. 0. 5 liters of product will be enough to handle 7 squares of wood flooring.

How to buy a high-quality product?

The recommendations are as follows:

  1. Choose the oil that has 100% written on the package, or if you need to get natural, thin coating.
  2. Buy a polumerized tung oil if you want to create a thick, glossy finish.
  3. If a green tint of the product is noted, its quality will be reduced and the highest quality oil will have a beautiful honey color.

Ideally, the very raw materials for the goods grew in ecologically clean regions of the producing country - the quality of processing will not cause any complaints.

Product Application Methods

It is not difficult to use the material, but it will take a lot of time to prepare the wood product.

It should ideally be dry, and therefore, after fine sanding, it should be dried in air, but without access to the sun. Fungus can most likely appear on the wet surface of the wood, and even an extract from the tung cannot protect it.

Before actual application, the following steps should be taken:

  • Treatment with tung oil - composition and properties of the product Remove all particles, lint, dirt, remove wax, if you have one.
  • Check the oil shade on a small and inconspicuous area of ​​the tree (can be added to the tinting agent if necessary).
  • It is important to fill large pores on a product with a special agent, if appropriate.

To apply, you need to take the right brush, smear the product, creating a thin layer. It is worth removing streaks and drops with a soft cloth, and it is also important to carefully polish the wood with it. The first layer is usually made the thinnest, and after it dries (after 10 hours) at temperatures up to +25 degrees Celsius, the next layer can be applied.

Experienced craftsmen recommend leaving the material to dry after impregnation with tung oil for a day, and only after that grease it with a second layer of oil. For even faster drying, you can dilute the product for the first layer with white alcohol, and the next layers should be done without dilution.

Typically three layers of impregnation should be applied to fresh wood. It is worth renewing the furniture covering at least once a year - in this case, it will serve for decades. To give a shine on top of the made coating, it should be treated with wax. In the future, pieces of furniture are made red so that any compositions are best combined with a tunga hood.

Storage and safety measures for tung oil

It is important to store the product away from sources of fire, light and heat.

The room should be well ventilated, and the container should be tightly covered during storage. The shelf life is usually at least 5 years, and it is not at all worth allowing the product to freeze, because otherwise its properties may be eliminated. Despite the fact that the sap of the plant is poisonous, the finished oil will be of low toxicity. And it is also used only for technical purposes, and getting inside the body itself is unacceptable. Store packages with goods so that children do not have access to them.

After the work done, all tools and materials can be easily washed with turpentine, gasoline. Hands, as well as other parts of the body, after getting the product on them, it will be enough to wash it with soap. In case of contact with eyes, they must be rinsed abundantly with warm clean water.

( 1 grade, average 5 of 5 )