Thanks rickpark for responding. The use of a tube to reinforce neck as preventive measure makes alot of sense. I have considered using a copper sink drain pipe used for traps and install inside the neck but only size available is 1.5 od, similar to od of neck pipe. May work if split longitudinally to leave a gap to adjust od and locate gap opposite to existing crack then collapse od to fit. Type of plastic used by Behr/MB still a factor to consider when using adhesives and, hopefully, someone on forum has this knowledge. Super glue would probably work but it sets so fast and is so permanent I am afraid to use it.