Outdoor teak table mould inhibitor?

[leyton01]

We have an outdoor table made from teak which was originally clay brush finished. The finish wore off a long time ago and being an outdoor (but under cover) table it suffered from spots of mould. A few years ago we cleaned it with citric acid and finished it with Bondall Monocel Timber Bench Top Oil which turned it bright orange!

We often power wash the table to get rid of mould (without applying a finish) but I am hoping for a longer lasting solution. I have purchased some Intergrain Ultraprep Mould Killer to clean the table but want to use a finish to hopefully inhibit the growth of mould. Are there any oils which would be suitable? I am really looking for something which will not change the timber colour significantly like the monocell did. I would prefer an oil and not polyurethane as the surface is textured and scraping off poly in a few years would be impossible. I have used Osmo Poly X on a few projects and I liked the finish but not sure if this will go any way to preventing mould?

[leyton01]

No collective wisdom about this?

[Pat]

Leyton, have you treated the mould spores?

Otherwise they will bloom, again. Pressure washing only removes the visible layer.

I use white vinegar for mild spots or diluted oil of cloves for moderate infestations. You will have to test either way to see if it will stain or damage the timber first.

[leyton01]

I am going to use the Intergrain Ultraprep Mould Killer I have purchased. (Maybe a wash with Concrobium mould kill as well).
I am just trying to find out what to seal with after I have cleaned it.