What is a good wood epoxy for strengthening a floor joist?

This question is part of the same project that I wrote about here - http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/28596762/gotomsg/28596762/p/1.cfm#28596762. It's its own question though so I hope it's OK that I made a separate post.

The picture below is of a floor joist that I am repairing. I am going to put a sister joist along side of it, but before I do I plan to dig out the 1/2 inch of rot in the current joist and fill it with a good epoxy.

I went by Home Depot and all they have is the cheap wood filler. It looks like I'll be ordering from Amazon! Does anyone have suggestions for a good epoxy to use? Abatron and PC Woody both have good reviews on Amazon but I don't have experience with either one.

I want something as strong as possible since it will be supporting weight if someone happens to step right on that spot.



Direct link to pic in case it doesn't display - https://www.dropbox.com/s/8qrlvjr8jm0rn3r/20151005_000445.jpg?dl=0

Thanks in advance for the help