On Fri, 26 Jul 2013 20:47:07 +0100, Brian Gaff wrote:

Its semi transparent and probably would not make it look a lot different
I'd say.

Hum, the Cuprinol Garden Shades "Black Ash" I've just used is pretty
opaque and film forming compared to the old Cuprinol Garden Shades
"Black Ash", that was more like a stain.

The new only contains terbutyn an algicide the old stuff had three
chlorophenol type compounds for fungal and algae control. I guess the
compounds used in the old worked and have now been banned...

--
Cheers
Dave.