Sealant

Interesting first post.

OK what are you trying to seal-- what material(s)? Horizontal or vertical surface?

USAJC wrote:
What about the NuFlex 640?

Where/how will you be using the Nuflex? The intended usage makes a difference.

This appears to be a sales post.

2oldman wrote:
This appears to be a sales post.

That's what I was thinking but, the OP had the wrong address.
I'm sure they will be back to respond to the questions about its intended use. ;)

Roof, window or sidewall? Makes a difference.