Caulk or adhesive to seal/affix replacement SPA gun body inside gunite hole

I need to replace two leaking, damaged straight PBC jets bodies (venturi guns), specifically Pentair 46540100 I have chipped concrete and cut rebar to gain access to the back of the guns and their water/air plumbing.

How shall I fill gaps and seal the replacement PVC jet body to the pool-wall gunite?

What caulk or adhesive do you recommend and why?

Here are the options I have located online:

Nitrile rubber Permaseal brand:
http://www.kelleytech.com/olympic/ol...view.asp?ID=29
Polyurethane adhesives:
Sikaflex, 3-M 5200
Hydraulic cement Waterplug brand:
http://www.thoroproducts.com/pdf_app..._waterplug.pdf
Silicone:
E-Z Patch 22 Neutral Cure 100% Silicone Rubber
Epoxy:
Loctite Fixmaster www.henkelna.com/concrete-repair-6137.htm
Leakmaster Quick Set Pool Epoxy Putty
Simpson Strong-Tie SET http://www.strongtie.com/products/an...SET/index.html
Others:
www.repairproducts.co.uk/page66.htm

You've already ID'd some of the higher quality products out there. But my experience is with operating large commercial pools, and with pool chemistry, not with concrete re-construction. I've done some of that successfully, but not enough to make recommendations.

And, there are only a few pool guys here, because I've always had such a strict 'No Sales, No Promotion' policy here.

You might want to post on poolspaforum.com -- a lot of pool guys hang out on that forum.