The Paint we work with is Cuprinol Garden Shades, for the reasons it is a water-based, non-toxic product with low VOC and has a conforming Safety Data Sheet... PLUS they have a fantastic range of colours*.
Safety Data Sheet
Cuprinol says: Cuprinol Garden Shades have been specially developed to colour and protect sheds, fences and other garden wood. It's special pigments ensure a rich colour and allow the natural texture of the woodgrain to shine through. It can also be applied on terracotta, brick and stone, to bring beautiful colours to the rest of the garden.
* Whilst we stock a variety of colours, if there is a specific colour you would like- please do get in touch so we can hopefully being able to source it for you.