Sealing the tree trunk - the best methods

Sealing the tree trunk - the best methods

Why sealing is so important

Under no circumstances should wood be exposed to moisture, otherwise it will quickly rot. Why that is, some gardening enthusiast might think, my apple tree has been in the garden for 20 years and is still busy bearing apples. Well, a tree trunk is so-called dead wood, which in nature is quickly decomposed by putrefactive bacteria and fungi. These prefer a rather damp environment, which is why the wood must be kept as dry as possible. Wood preservatives seal the pores of the surface and thus ensure that moisture and microorganisms cannot penetrate.

also read

  • Debarking a tree trunk - This is how it works
  • Cut the tree trunk into slices - that's how it works
  • Impregnating a tree trunk: You have these options

What means are available for preserving the wood?

There are various means available for preserving the wood, all of which have different advantages and disadvantages.

Wood preservativesadvantagesdisadvantageparticularities
Oil (e.g. linseed oil)Penetrating deep into the wood, natural, ecologicallinseed oil varnish sticks quicklynatural looking wooden surface
Wax (e.g. beeswax)Penetrating deep into the wood, natural, ecologicalsticks quickly, can soften when exposed to heatfor interiors, very good for allergy sufferers
glazecontains color pigments, weather-resistant, long-term protectioncovers grain, often contain solventsprior priming makes sense
paintoften colored and opaque, weather-resistant, long-term protectioncovers grain, often contain solventsRoughen the wood before treatment

Seal the tree trunk - this is how it works

To preserve the tree trunk, it is best to proceed as described:

  • Let the wood dry thoroughly first - the drier, the more durable!
  • Remove the bark.
  • Roughen the surface a little with sandpaper.
  • When using a glaze, a primer should be applied beforehand.
  • Apply the desired wood preservative, preferably with a thick round brush.
  • Brush evenly from top to bottom.
  • Also, always paint in the direction of the grain.
  • Wood preservatives must be applied in several layers.
  • In between, the respective layer must be able to dry out well.
  • So paint several times with an interval of several days.


When setting up the tree trunk in the garden, you should also try to avoid any contact with the ground: This means that no soil-dwelling putrefactive bacteria or fungi can penetrate the wood, and it also stays away from moisture from the earth.