I bedded a couple of rifles this week. I used Devon F Aluminum putty. Wonderful stuff to work with. My 3 pound can is marked "March 2010" and it still works just fine.
I used this mold release:
I like the spray release because it is fast and easy to apply and it gets into everything.
And when I took the action bolts off the rifle popped right out of the action. Good stuff.
I don't know where I got this from. I used up a can of mold release from another maker over the last 15 years, and it worked great, too.
When you bed a rifle the last think you want is any failure of the release.
I used this mold release:

I like the spray release because it is fast and easy to apply and it gets into everything.
And when I took the action bolts off the rifle popped right out of the action. Good stuff.
I don't know where I got this from. I used up a can of mold release from another maker over the last 15 years, and it worked great, too.
When you bed a rifle the last think you want is any failure of the release.