I have a timber faced house, cedar wood. It has a rough "scalloped" surface similar to decking. For the last 15 years I have used Cuprinol Decorative Wood Preserver, in Country Oak. This darkens it considerably, and protects the timber.
Each treatment has lasted about 5 years. It is now due for another coat, but I can't seem to find this product anywhere.
Can anyone advise on compatible products, the main aim being decorative. A dark colour, even black, is the aim.