If you are thinking of Penofin look here http://www.penofin.com/products_marine.shtml
On the bottom of the page the following is stated
"Expect 3-5 years on vertical surfaces,
1-2 years on horizontal surfaces
depending on use and weather exposure".
If you are thinking of Penetrol look here http://www.floodaustralia.net/contents.htm
This site gives the same kind of blather about how good the product is; but fails to state, as with Penofin, how long a treatment will last before it will need refurbishing.
All in all, I am thinking of Penofin for my deck.
Personally, I like the ugly look of silver cedar. SWMBO doesn't.
| >> So...does it keep wood from going that gawdawful gray?
| >That would be called silver, the colour of distinction... and yes, it
| >inhibits that greatly, assuming sufficient coverage.
| "Silver, the colour of distinction" on wood is what I refer to
| as BFU GRAY, bubba. I like my wood WOOD colored, thanks, and will
| have to try some of that Penetrol straight. What do they get for
| a gallon of it, or does a quart go a long way?
| Chaos, panic, and disorder--my work here is done.
| http://diversify.com Comprehensive Website Development