I want to put a preservative on the siding of my house. House is roughsawn white cedar clapboards, garage is roughsawn pine board & batten. When built 24 years ago they used bleaching oil on it, which gave it a somewhat gray color. All of it has since weathered to just about the color I want, so I'm not interested in stain.
I do want to preserve it, though. There are a few places where splashback from rain causes some particular problems, indicating it might need some special treatment. Generally, though, I want to do all the siding.
Growing up, we used creosote. The last time I went to buy some I found it hadn't been sold for years. Plus, it's black and smells and really isn't what I'd want on siding. Instead I bought green Cuprinol. Good protection, but still not a color I'd go with for siding.
I've heard of Penofin which sounds good, but at $40 per gallon and coverage on rough wood in the neighborhood of 100+ square feet per gallon, it seems a bit pricey.
John Martin Cumberland, Maine