2 of 2 people found the following review helpful
Cuprinol Ducksback Preservative,
Verified Purchase(What is this?)
This review is from: Cuprinol DBWM5L Ducksback 5 Year Waterproof for Sheds & Fences Woodland Moss 5 Litre (DIY & Tools)
Excellent product, exactly as advertised, and easy to apply. Of course I can't comment on how well it meets its 5 year "guarantee".