found this on the jb weld faq
Q: What color is J-B Weld when it cures? Is it clear?
A: J-B Weld cures to a very dark gray (steel-like) color. We're still working on a clear version that's just as strong as the original.
are thay viewng this thredd?
here is the link there is some cool info
http://jbweld.net/faq.php#faq003
...justin