I stained my fences with this exact stain in 2009 and they look like new. I am not using it to stain deck flooring; that is aluminum. Just the posts. The putty though I was wondering.

Will not hold up.

I read somewhere else - liquid nails. That sounds intriguing ........ I believe you are saying the putty, not the stain will not hold up.

Well in my opinion both, but you seem to like the Behr products.

Just the one. My wall paint is Glidden Diamond. The solid color Behr exterior stain has held up so far very nicely on vertical surfaces for the past 6 years with no fading..........

Is your Behr exterior stain still holding up and what color did you use?