yes it's this kind of epoxy glue. you can make your one by mixing cabosil in epoxy lam resin up to a thick past, like shoes grease. Spread it and glue fiber in. You can lam directly but stay in place better if you wait a bit.
I'm just finishing my first board with channels. I will post pics soon.
My two cents-
I did an extra tail patch and when I glassed I started to go crazy as the glass would pull up from the channels. I eventually figured out how to use two squeegees- one to tuck a channel and the other to hold in place the glass that otherwise would be pulled out of position.
With the second layer I tried the tacky epoxy baste coat. Word of warning- lay down you glass carefully because once it sticks, if you try to move it it will mess up the weave.
Be careful sanding. The resin of the hot coat tends to drain off the top edge of the channel. I got sand throughs after the first passe with the sander.
Actually I have done a board with channels before, but that time I bagged the laminate- e wings and channels and everything sucked down perfect.
Is it just me - I don't see what I would call channels in that first pic at all. What is the purpose of the cutaway areas?
"Everybody is ignorant only on different subjects." - Will Rogers