I have some mature oak trees in my yard that
I had built a tree house in for my son about 6 years ago.
I've taken most it down and after I finish removing all of
the metal bolts from the trees I'm wondering what to
seal the holes with.
In the past I've heard that you can use roofing sealer
Is this still a good solution or is there something better?
Thanks in advance,
Use nothing, leave the wound bare.
The outdated practice of using bitumen/tar has been found to actuall
seal in fungal spores and bacteria, hence accelerating decay/rot.
So long as the cut is made correctly, allowing the wound wood to hea
naturaly, the CODIT system will help to ensure minimal decay
The answer is no 1) because normally sealers aren't required and 2)
because asphalt based sealers should never be used.
The exception is to seal wounds on trees that are susceptible to
damaging insect infestation such as birch, oak, and elm trees with a
NON-asphalt based pruning sealer. However it is preferable to disturb
oak trees during the winter when the insects are not active and no
sealer is required.
Here are some references:
http://www.cahe.nmsu.edu/ces/yard/2001/021001.html [Why not use pruning
sealer? by University of New Mexico]
http://www.treehelp.com/howto/howto-prune-a-tree.asp [How to Prune a
pruning elm and oak trees by University of Minnesota]
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The sealers seal in bacteria and fungi and give them a protected place
to establish themselves.
In addition the solvents cause further injury.
Current practice is to clean wounds up smooth and not use any sealant.
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