Sikkens over Cabots (doesn't stick)

[Kashga]

I have laid a new deck eucalypt (Northern Box ??) anyway it's a top timber and very dense, much more durable than brush box.
I first painted it with a CCA, then later with a Cabots pigmented coat.
I was going to lay another coat and heard about Sikkens which I used, however a year later it is flaking off, (blistering), it doesn't appear to have soaked in or adhered.
Any clues as to what I might do now, another coat of Sikkens, or go with an oil
Thanks

[Larry McCully]

in order for your deck and coating to perform at its optimum, you need now to get a floor sander in and sand the deck back to bare timber timber and start over again. It does not work when you switch coatings of different types. Each coating type is made up of different substrates and may not be compatable with each other. So start again and stick with the one you started out with, no matter which one you choose, . oils are good as well as sikkins as well as cabots, which ever one you start with......... end with it.

[Big Shed]

I have laid a new deck eucalypt (Northern Box ??) anyway it's a top timber and very dense, much more durable than brush box.
I first painted it with a CCA, then later with a Cabots pigmented coat.
I was going to lay another coat and heard about Sikkens which I used, however a year later it is flaking off, (blistering), it doesn't appear to have soaked in or adhered.
Any clues as to what I might do now, another coat of Sikkens, or go with an oil
Thanks

Kashga, would need some more precise detail to comment, both Sikkens and Cabots make a multitude of products.
Does Sikkens recommend the product you used for use over a pigmented finish, is it a clear, is it waterbased, oil based............................

BTW Welcome to the forum, hope the very knowledgeable people here can solve your problem for you.